[JAM1775]

Bill.....could this be wheel hop ?? If so there is a fix for that with your 4 link suspension. I'm not sure I saw your wheels hopping severely but you could feel it through the chassis, steering wheel etc. It's caused by traction and the rear actually winding up then snapping back. The car shakes in all directions but feels like front& back shakes. If this is what you feel, the fix is in the upper/lower control arm angles, checking the pinion angle, setting the Instant Center and Anti-Squat. Most likey the latter two are where you'd be your concerned. In any event it sounds like a job for a shop with race chassis experience. There are 3 places on LI you can bring the car to....one is Pittbull on Edison Ave. The other is Delmonte Motorsports off Vets Highwy, Bohemia area. The third is down the block from MM. They can look at your rear end geometry and predict how your rear will react under traction. The diagnostics alone is well worth it.
Okay......I'll go back !! Woo Hoo !