| FAQ |
| Members List |
| Social Groups |
| Calendar |
| Search |
| Today's Posts |
|
#1
06-17-2008, 05:53 PM
|
||||
|
||||
aftermarket motor mounts and crossmember
My '73 Ventura originally had a Chevy 6 with a powerglide. I bought the aftermarket 1st gen Firebird frame-side motor mounts and th400 crossmember. I am using MityMounts on the engine. The same block, mounts and trans came out of my '69 Firebird.
2 problems...first it appears that one of the crossmember holes was not drilled in the frame. Is this common? Second, the motor mounts don't seem to line up properly...the engine is offset and crooked when the motor mount holes line up. Anyone heard of any issues with the aftermarket 1st gen f-body frame side mounts? We are swapping the mounts from my bird over tonight. Thanks!
__________________
All of my cars are Hybrids...they burn gas and rubber!  '73 Ventura, Spotts 462 roller 10.785 @ 122.79, 1.507 60 ft 2850 lbs. plus driver, 3150 race weight '69 Firebird Convertible, Spotts 455 with long branches 12.561 @ 107.62, best on old 455 4290 race weight '72 Formula 455 HO numbers matching auto, work in progress! |
|
#2
06-17-2008, 07:32 PM
|
||||
|
||||
|
Shelly-
YES the engine is offset, I think to clear steering box. I used a 67-9 Chevy camaro crossmember, fit perfect. I used original OEM firebird mounts, I left everything loose once the motor/headers were in place I tightened it all down. If you have time to do it now, do yourself a favor and put in a front All Pontiac engine plate. I will do that over winter. |
|
#3
06-17-2008, 09:31 PM
|
||||
|
||||
|
The engine drops right in with my old frame mounts from my '69 bird. I guess the after-market brackets are crap.
Also, the aftermarket th400 crossmember trans mount is off. The old crossmember from my bird works fine. We wasted hours on this....damn!
__________________
All of my cars are Hybrids...they burn gas and rubber! '73 Ventura, Spotts 462 roller 10.785 @ 122.79, 1.507 60 ft 2850 lbs. plus driver, 3150 race weight '69 Firebird Convertible, Spotts 455 with long branches 12.561 @ 107.62, best on old 455 4290 race weight '72 Formula 455 HO numbers matching auto, work in progress! |
|
#4
06-18-2008, 06:31 AM
|
||||
|
||||
|
That sucks.
Good to know. |
|
#5
06-18-2008, 01:09 PM
|
||||
|
||||
|
Only thing I had to do when I installed a T400 in mine was I bought an OEM crossmember from PY and had to drill the 2 holes in the frame that were not there on my car but were obviously in the crossmember. Everything else lined up fine, never had any problems.
__________________
74 GTO Bracket/Street car and another 74 for the wifey to race with! 70 GTO 400, 4 spd, #'s matching and a little to nice for me to own. Friendship is like peeing your pants..everyone can see it but only you can feel the warmth! |
|
#6
06-18-2008, 03:59 PM
|
||||
|
||||
|
Rob, the key word is OEM. Mine is one of the aftermarket pieces...POS! Comparing the original from my bird to the aftermarket piece, it is obvious what poor quality the aftermarket is.
We did have to drill the 2 frame holes...was obvious after looking at my bird's subframe. The trans was not close to the crossmember mounting holes when we lined it up. Using my old trans crossmember, everything fits perfect...same as the engnine mounts.
__________________
All of my cars are Hybrids...they burn gas and rubber! '73 Ventura, Spotts 462 roller 10.785 @ 122.79, 1.507 60 ft 2850 lbs. plus driver, 3150 race weight '69 Firebird Convertible, Spotts 455 with long branches 12.561 @ 107.62, best on old 455 4290 race weight '72 Formula 455 HO numbers matching auto, work in progress! |
|
#7
06-19-2008, 03:45 PM
|
|||
|
|||
|
Shelly, you get everything done on your car? How's the dash coming? I wanted to see progress pictures to see how yours turned out.
Kenny
__________________
Kenny Cincinnati, Oh 1971 Ventura II 400 .060 Eagle Rods |
| Reply |
|
|
The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.
Linear Mode
