Longer Shocks
I really like the QA1 shocks. they come in fixed, single adjustable and double adjustable. The range of adjustments goes from soft to very firm. I run mine on the second from the softest setting front and rear. Very good quality shocks.
https://qa1.net/vehicles/mopar/car/barracuda/1967-1969/shocks/
My '70 'Cuda has a stick and a stroker motor. Controlling the body separation on the hit was an issue, I ended up getting a pair of AFCO double adjustable with their Big Dog valving. It's the only shock I've found that controls the separation on launch.
When I measured the eye to eye length with the shocks removed and the rear end sagging while the body was up on jack stands, I found I needed about an additional 2 inches in length over stock. I'm running a pair of 3200lbs driver's side springs with inset hangers. I control the spring wrap with a set of properly adjusted slapper bars. This set-up is the best I've found in the last 40+ years of experimenting.
