#4741  
Old 08-15-2015, 08:45 AM
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Quote:
All 73 SD engines should have cast dates in Nov or Dec 72 on the block, heads and intake.

I have seen one 73 SD TA with a Jan 73 dated block, it was an obvious re-stamp.

If anyone has seen anything different than this, I would like to know.
This is what I show from my EUN database:

Quote:
My EUN data shows K112, and one K182 (plus the A??3 but probably not correct, as toomany said a restamp?) for the 1973 SD block date code in 73 Birds.

1974 Birds shows K112 and K182 until A093 in January. Then a batch of L203 dated blocks June. An A094 in June. A C294 in late June.


I have a lot more SD block/eun's but a lot of them I don't have a date code listed.


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  #4742  
Old 08-17-2015, 06:24 AM
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Default Cool 73 video

One owner 73 thats been slightly customised over the years.
Still very tastleful and seems like a top guy.

Heres the link below.

https://youtu.be/-6UHj1TWsMw

Michael

  #4743  
Old 08-20-2015, 08:25 AM
sdbob sdbob is offline
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Well got educated. I could have !!!!!!!!, My original March 74 SD DOES have an LS2X INTAKE. My racer has an LS 2 intake with the stamped part no.

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Old 08-20-2015, 08:33 AM
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When I get time I will look at all nos. And cast nos

  #4745  
Old 08-23-2015, 12:48 PM
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On 8-22-15 we took a couple of Super Duties to the dragstrip in Byron Illinois.
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Old 08-23-2015, 01:51 PM
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Very cool!

How did they run?


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  #4747  
Old 08-23-2015, 02:29 PM
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Quote:
Originally Posted by johnta1 View Post
Very cool!

How did they run?

Thank you, and thanks for asking. The blue one ran 12.74 @ 107.5 and the red one went 13.51 @ 101.9.

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Last edited by PAUL K; 08-23-2015 at 02:52 PM.
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Old 08-23-2015, 03:05 PM
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That's a good time for the blue one.
Who owns that one?

Have the domed pistons in it?


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  #4749  
Old 08-23-2015, 03:10 PM
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Quote:
Originally Posted by johnta1 View Post
That's a good time for the blue one.
Who owns that one?

Have the domed pistons in it?

I own the blue car. Flat top pistons but the heads have been milled .060.

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Old 08-23-2015, 03:58 PM
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Quote:
Originally Posted by johnta1 View Post
That's a good time for the blue one.
Who owns that one?

Have the domed pistons in it?

Looking at his avatar, I would have thought he owned the red one too.
http://www.forums.maxperformanceinc....1&#post5429121

  #4751  
Old 08-24-2015, 10:13 AM
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Curious about blue car. Stock lift cam? Exhaust? Street tires? Gear ratio? Just wondering about current tech to get 12's out of these cars.thanks Bob.

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Old 08-24-2015, 11:56 AM
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Hey Guys, I posted some radiator tag questions in another thread, now I'd like to see how it relates to any of us guys with Auto Tran's SDs. I believe we all got the HD cooling. HfR gave me good education on the tanks and tags these cars had, and apparently what I learned from my build sheet is there were two radiator choices depending on part availability.

Can anyone who's willing have a look down the pass side tank of their radiator and see what two letters are embossed? Mine had an AE. I think CU may be another possibility. And if any of you can snap a pic or at least divulge some of the tag codes if it's still there that would be massively helpful too!

Thanks,
SD73

  #4753  
Old 08-24-2015, 12:58 PM
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Quote:
Originally Posted by sdbob View Post
Curious about blue car. Stock lift cam? Exhaust? Street tires? Gear ratio? Just wondering about current tech to get 12's out of these cars.thanks Bob.
The camshaft is a custom hydraulic flat tappet that is slightly smaller than the RAIV cam. It has about .510 lift (with 1.65 rocker) on the intake and .470 on the exhaust. It idles like the original cam with 1.65 rockers. The exhaust is factory ported manifolds, mandrel bent 2.5" head pipes, aftermarket cross flow muffler with factory tail pipes and tips. Mickey Thompson 255/60-15 drag radial DOT tires, 3.08 gear ratio.

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Old 08-24-2015, 01:06 PM
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Larry Navarro Larry Navarro is offline
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^^^^......Very similar combination to my old SD clone T/A, running mid-high 12's @108.

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Old 08-24-2015, 08:23 PM
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Quote:
Originally Posted by Held for Ransom View Post
Looking at his avatar, I would have thought he owned the red one too.
http://www.forums.maxperformanceinc....1&#post5429121

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Old 08-26-2015, 09:28 AM
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Thanks for info. Just curious how guys get these cars into 12's stock.

  #4757  
Old 08-26-2015, 09:39 AM
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Quote:
Originally Posted by sdbob View Post
Thanks for info. Just curious how guys get these cars into 12's stock.
You're welcome. It doesn't really take a lot. I was inspired by the three part magazine article Cars magazine did but used a more modern day approach. Once I upgrade the fuel system I want to try 3.42 gears. The car is going through the traps around 4200 rpm.

On page 224 of this thread there is a more detailed post on my build.

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Last edited by PAUL K; 08-26-2015 at 09:54 AM.
  #4758  
Old 08-27-2015, 07:45 AM
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My 74 is stock. Drove it to Norwalk 8 9 times.showed it sat,raced it Sun, 14.1,then drove it home.The racer is all gm parts,except HO racing stocker regrind,stock lift.12 teens,110 fastest.3700lbs.It's tired,still 12.4s .

  #4759  
Old 08-27-2015, 08:52 AM
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That's cool! Did you have to do anything with the fuel system on the 14.1 car? When I got mine it would not go more than a gear and a half without running out of fuel?
The low 12 car a 73 or 74?
Any pictures of either?

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Old 08-28-2015, 08:13 AM
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Yes I had starvation problems. Put a,small old conelec pusher worker ok.Removed stock filter placed in line filter near where line comes up by alternator. Going Back To stock. Like to find out how these guys go 12's with stk pump. Haven't posted pics . Other than that trouble free.Street raced a few cars on way to Norwalk a few times. That 1 vette when it hit 2nd I went by him!! The suspension is stk. It shuddered when I came out hard at Norwalk. So just tried to ease it out.

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