APIKOL rear diff mount installed
2)fuel pressures
3)injector seals(highly recommend this one)
4)cam to crank timing
5)plugs
6)clean out thottle body
7)check for vaccum leaks and clogged crankcase vent hoses & pcv
Balance issues:
1)faulty or failing pressure plate
2)flywheel failing or needs to be retorqued
I could go on, but you get the idea. That Apikol mount was one of the best mods done to our car. You might consider doing the Stern rear diff bracket bushings.
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