Sounds like a broken record........But, you are going to need a better shock on the rear. The "truck" shocks are not gonna get it done
It may be a good idea to look into DA shocks valved just for your combo?
Well, when I upgraded to longer DA coil overs on the front of my Duster, I took the old ones and put them on the front of the Cuda...Probably the only thing making it semi work were those and the way I have them setup for the Duster......So yes DA shocks will be on the upgrade list for the rear so I can stiffen it and yet keep it squatted in the rear....
Car still runs like stink for launching at 1700-2k and shifting at 6500....I will lean the carb out later this week a tad, and I need a better timing light. Mine is too dim in bright light. For now, its just going to either hide in the garage or hit a couple cruise nights...Done flogging it for a bit.
If I make it too fast, I won't need a race car.