Finally get to pretend I am one of the cool kids - Holley kit swap

racerjoe said

If I remember correctly, mine is around 3 degrees. It was never right after I installed the TKO. Someone once mentioned to me the old school TKO500 conversion kits (Kiesler Mfg.) always had the angle wrong. At one point, I shimmed the trans mount up until the trans was hitting the tunnel I modified to work with their mount. It was marginally better, but with my lowered ride height, I knew I'd have to cut the tunnel and rebuild it. When I did the hemi swap, I cut the tunnel out, shimmed the trans and rebuilt the tunnel. I want to say I have a 3/4"-1" shim on the mount. Talk about way off! I can do well over 100mph now with no driveline vibration. Note, I don't think the too low trans mount would be a problem for guys running super stock springs with the *** end up in the air.

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Until I started the T56 swap, I didn’t realized how much the u-joint angles was a part of this process. It’s been a real eye opener for me. And it isn’t just what angle the motor is at, like you said with the SS springs, the attitude of the car has a huge influence.

Funny thing is, for me to say my motor is at 3 degrees is kind of pointless since that is measured relative to the ground. I need to take an angle measurement on the bottom of the front frame horn where it ties into the TB crossmember. Not certain that is very consistent, but it’s the only place I can find that isn’t sloped. Maybe it would be a useful reference for other people.

I too have heard that the Keisler TKO kits put the tail down to make it fit the A-Body but wouldn’t have guessed you would need 3/4-1” to get it right. That’s a bunch.