Sorry, posted on the wrong thread!I’ll chime in on that if it ok. I had a 69 z28
(Should say my bosses) , high dollar retro rod. 502 Ramjet. The builder was out of Tennessee. Anyway, racked it, checked it out. Everything tight. Noticed a triangle polyurethane wedge type trans bushing. Drove the car and noticed a vibration at 40-50 mpg, figured the custom wheels. Get on the car fairly hard through 3 gears. It’s pulled like, em ok but, something wasn’t right. Took it the dyno for some pulls and oil pressure gets to 10psi and I say “stop” for now. Drove around to the front of shop and shut it down. 10 minutes later, it won’t start. No jump box turning this over. Put a breaker bar on the crank, nope. Locked up! The T6 ( input shaft ) however installed had so much pressure on the crank just destroyed the rear crank bearing, that I think had the thrust as on it as well. The problem was the position of the crossmember being slight out/wrong by just a little. You all know what the fix was. It was built to be a trailer queen in beautiful tangerine orange. Just thought I’d throw it out there.