I took the measurements with the car on my 4 post which is verified level.
My car is very low. Prior to the swap it did not have a shudder with the th400, at least not at low speed. I did have a droning type vibration at the big end of the quarter mile so about 100-105 mph that I noticed. That could be related.
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-Jason
1969 Pontiac Firebird
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