Got a 90 TII with an LT1 putting 365hp to the wheels. Its wheelhopping like crazy. The rear end has been welded to the mount elimating the rubber bushing on the front. Also all the rubber mounts have been switched to poly. The gear noise in the car is LOUD but it still hopps.

Running new Zeal coil overs, and HR springs.

Any input would be great.

 

how do the other bushings in the rear lookin? like sway bar bushings, rear control arm bushings, and so on. check those out to see the condition, that may be one of your problems.

 

Adjusting the shocks to be stiffer should help, other than that keep eliminating rubber bits that can flex and replace them either with stiffer rubber or urethane, or with solid pieces.

 

Learn how to drive is all. You need to come out of the hole harder slip the clutch after you come off of it.

 

make sure your tire pressure i up