Ted,we use QA1 and Comp Eng shocks on most of our ladder bar cars.We set the extension as loose as we can and compression as tight as we can.Most of our ladder bar B-bodys similar to your car work well and see low 1.30 to 1.26 60 fts.On a high nine to ten second bracket car it's what works and what makes each run consistant that is important.Quick lift and weight transfer of the weight and keeping the weight planted while under power is important.A loose rebound will cause suspension dynamics which can cause et loss and occasionally steering issues on the big end and when braking.This referrs to stock suspension backhalved cars and not full chassis cars.