Originally Posted by bobscogin
The car is a 1985 Firebird with a TH-350.
Could be a clue here. The TH350 wasn't originally installed in your car. Does it have the stock rear axle torque arm set up which attached to the transmission? If so, how is it attached? To the transmission, crossmember, or what?
No, I ripped out the original suspension and installed a 4 link. I know what you are talking about with the torque arm, we used to snap off the trans tailshaft while running that setup. I learned that one a long time ago.