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Old 06-23-2020, 12:58 PM
grd777 grd777 is offline
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Default need help . want to install core support bushing on my 72 formula

i am a ford guy , so i am new to these sub frame bushings . anyone have a good photo of a installed core support bushing for a 72 formula

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Old 06-23-2020, 02:11 PM
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tdavidl tdavidl is offline
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see if this thread helps, otherwise to a quick search on this 70-73 firebird forum & there's many threads:

http://forums.maxperformanceinc.com/...32#post1702032

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Old 06-23-2020, 10:22 PM
grd777 grd777 is offline
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Quote:
Originally Posted by tdavidl View Post
see if this thread helps, otherwise to a quick search on this 70-73 firebird forum & there's many threads:

http://forums.maxperformanceinc.com/...32#post1702032
thanks , i did a search but did not find much

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Old 06-24-2020, 09:58 AM
78w72 78w72 is offline
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Quote:
Originally Posted by grd777 View Post
i am a ford guy , so i am new to these sub frame bushings . anyone have a good photo of a installed core support bushing for a 72 formula
are you needing the lower bushings or the upper ones? heres a couple crappy pics showing the lower & upper, not the best angles but gives you an idea of how they go. i can find better ones if others dont post any.
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Old 06-24-2020, 10:15 AM
grd777 grd777 is offline
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Quote:
Originally Posted by 78w72 View Post
are you needing the lower bushings or the upper ones? heres a couple crappy pics showing the lower & upper, not the best angles but gives you an idea of how they go. i can find better ones if others dont post any.
working on the lower ones for now , if you have better photos that would be great seems like the bolt here is much longer than mine

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Old 06-24-2020, 10:32 AM
78w72 78w72 is offline
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Quote:
Originally Posted by grd777 View Post
working on the lower ones for now , if you have better photos that would be great seems like the bolt here is much longer than mine
ok will be a little later when i can search through my photos. im sure others here have better pics they can post too.

thats a factory bolt as far as i know.

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Old 06-24-2020, 12:32 PM
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Core support mounting videos. Watch THIS >> https://www.youtube.com/watch?v=t9DtbP4ez2A
and This >>> ..https://www.youtube.com/watch?v=bHJLaqe-qnQ

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Old 06-24-2020, 01:47 PM
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Quote:
Originally Posted by Formulabruce View Post
Core support mounting videos. Watch THIS >> https://www.youtube.com/watch?v=t9DtbP4ez2A
and This >>> ..https://www.youtube.com/watch?v=bHJLaqe-qnQ
thanks , i did see that one . hoping to get a close up photo of new ones installed in the car

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Old 06-24-2020, 03:29 PM
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the core support hangs off the bottom of the subframe, that's what is important. It is "spaced" down from the frame with the washers in the video. Sometimes more than 2 washers are used for alignment. In the video, the core support that's ready to mount is just how it goes and the frame sticks through the big hole in the core support. Once mounted barely tight it can slide side to side with the biscuit mounting hole being oblong.

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Old 06-24-2020, 04:33 PM
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Quote:
Originally Posted by Formulabruce View Post
the core support hangs off the bottom of the subframe, that's what is important. It is "spaced" down from the frame with the washers in the video. Sometimes more than 2 washers are used for alignment. In the video, the core support that's ready to mount is just how it goes and the frame sticks through the big hole in the core support. Once mounted barely tight it can slide side to side with the biscuit mounting hole being oblong.
this is the kit i got from classic ind . it does not seem to be the same as the ones in the vid . the lower bushing does not fit in the hole in the core support
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Old 06-24-2020, 11:29 PM
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Quote:
Originally Posted by grd777 View Post
this is the kit i got from classic ind . it does not seem to be the same as the ones in the vid . the lower bushing does not fit in the hole in the core support
This is a CAMARO mount and is used on the TOP of the subframe.
The tiny "cap" is not enough for the bottom, IF you try to use this mess.
Its Not right, and it will NOT adjust side to side unless you really hog out the core support side to side and front to back.
The correct ones are Cheap. You have gone to great lengths on here to get the correct info, and correct parts. Why quit now?
The bushing kit is in stock at Ames.
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Last edited by Formulabruce; 06-24-2020 at 11:35 PM.
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Old 06-25-2020, 01:56 PM
grd777 grd777 is offline
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Quote:
Originally Posted by Formulabruce View Post
This is a CAMARO mount and is used on the TOP of the subframe.
The tiny "cap" is not enough for the bottom, IF you try to use this mess.
Its Not right, and it will NOT adjust side to side unless you really hog out the core support side to side and front to back.
The correct ones are Cheap. You have gone to great lengths on here to get the correct info, and correct parts. Why quit now?
The bushing kit is in stock at Ames.
thanks , i did not think that these looked right , will be the ones from ames

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Old 06-24-2020, 04:58 PM
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Maybe I can help.

That looks from here like the correct stuff.
My brother was struggling with this when he started re-assembling his '73 about a year ago, and I seem to remember describinh it to his, to not avail, so I found these pictures:


(I believe I have a small typo, but please roll with it)

Here's anther picture:



Now, here's my attempt at describing it;
From top to bottom it goes like this:
  1. funny threaded washer
  2. bottom of subframe
  3. metal washer
  4. small rubber bushing (with large ID hole)
  5. rad support
  6. large busing with collar; pushed up against underside of rad support; the collar fits inside of the rubber bushing ontop of rad support
  7. metal washer
  8. large bolt threaded upwards to the funny threaded washer

I believe that shims are added in between the subframe, and rubber bushing to get the rad support where you want it.

I trust that if my memory is failing me, that someone should chime in to correct me.
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2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs)
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Old 06-24-2020, 05:16 PM
grd777 grd777 is offline
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Quote:
Originally Posted by unruhjonny View Post
Maybe I can help.

That looks from here like the correct stuff.
My brother was struggling with this when he started re-assembling his '73 about a year ago, and I seem to remember describinh it to his, to not avail, so I found these pictures:


(I believe I have a small typo, but please roll with it)

Here's anther picture:



Now, here's my attempt at describing it;
From top to bottom it goes like this:
  1. funny threaded washer
  2. bottom of subframe
  3. metal washer
  4. small rubber bushing (with large ID hole)
  5. rad support
  6. large busing with collar; pushed up against underside of rad support; the collar fits inside of the rubber bushing ontop of rad support
  7. metal washer
  8. large bolt threaded upwards to the funny threaded washer

I believe that shims are added in between the subframe, and rubber bushing to get the rad support where you want it.

I trust that if my memory is failing me, that someone should chime in to correct me.

this is great , thank you for the photo .
do i have to ream out the hole in the rad support to get the bushing to go in

also does anyone sell the funny threaded washers

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Old 06-24-2020, 06:46 PM
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unruhjonny unruhjonny is offline
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you should NOT have to ream the rad support.

you already have the "funny washer";
there were several versions of them, iirc they changed from year to year;
You have one pictures (in the picture of your kit) on the left/bottom - the only difference is that your's isn't threaded, but have a clip with a cage nut on it.

The one from my car (1970) probably used that exact setup -right now the crusy setup I put aside has just a nut ontop of the funny washer;
As I recall it was made that way so that it too only one person on the assembly line to attach and tighten the connection - the "funny" part is a little grab bar for finding the bolt end when you're underneath.

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Quite likely one of few '70 Muncie three speed Formula 400's left.


1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing)
2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs)
  #16  
Old 06-24-2020, 07:05 PM
grd777 grd777 is offline
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Quote:
Originally Posted by unruhjonny View Post
you should NOT have to ream the rad support.

you already have the "funny washer";
there were several versions of them, iirc they changed from year to year;
You have one pictures (in the picture of your kit) on the left/bottom - the only difference is that your's isn't threaded, but have a clip with a cage nut on it.

The one from my car (1970) probably used that exact setup -right now the crusy setup I put aside has just a nut ontop of the funny washer;
As I recall it was made that way so that it too only one person on the assembly line to attach and tighten the connection - the "funny" part is a little grab bar for finding the bolt end when you're underneath.
thanks again for the help . i just tired and the rubber bushing will not go in , will need to make the hole a hair bigger , what do you think

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Old 06-24-2020, 07:47 PM
78w72 78w72 is offline
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sorry i couldnt find any good pics of the assembled bushings, & i used poly from energy suspensions so they arent the exact same shape as the factory rubber. but, i recall them not fitting in the hole like your rubber ones, so i chose to just enlarge the hole a little with a carbide bit on a drill instead of finding new bushings that fit, although my kit was for my year car so not sure why they were bigger. it didnt take much at all & wont harm the integrity of the core support, just be sure to paint the bare metal if you do it.

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Old 06-24-2020, 07:54 PM
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Quote:
Originally Posted by 78w72 View Post
sorry i couldnt find any good pics of the assembled bushings, & i used poly from energy suspensions so they arent the exact same shape as the factory rubber. but, i recall them not fitting in the hole like your rubber ones, so i chose to just enlarge the hole a little with a carbide bit on a drill instead of finding new bushings that fit, although my kit was for my year car so not sure why they were bigger. it didnt take much at all & wont harm the integrity of the core support, just be sure to paint the bare metal if you do it.
ok that what i will do cheers

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Old 06-24-2020, 10:48 PM
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different view
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Old 06-25-2020, 01:57 PM
grd777 grd777 is offline
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also bought these from classic , body mount bushings , are the wrong also
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