408/ 904 trans

skrews said

^^^ Agree. The Mopar A body has terrible suspension issues arising from the VERY POOR instant center location that causes too much hit and separtion. 4 link or ladder bars will fix it but are a big and expensive undertaking for most. This is why so many of us run Caltracs or some variation of Caltracs, they are relatively inexpensive and easy to bolt on. Unfortunately Caltracs do nothing to relocate the instant center in the car regardless of the propaganda out there to the contrary. The best thing one can do is keep the cars ride height low, set the Caltracs to induce the least amount of hit as possible (lower hole with gap), and run a good double adjustable shock. I'm looking to upgrade my Viking shocks to custom valved Crusader series in the near future.

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Have to disagree with ya there. The A body has lots of rear overhang and makes an excellent racecar. Thats why if you go to any bracket race, you see more Dusters than Carter has liver pills.
I raced a 70 Duster for many years in various forms, the last few years with a 9 sec stroker smallblock.
I had 002/003 leafs and CE 3 way shocks on all 4 corners and the car would hook on ice with 28 by 10 bias ply DOT tires. Anywhere. Won races and went rounds with that car. It was better than the driver( me.. lol)
I find more posts from guys who have bought Cal tracs and put them on A bodies and cant get the car to stick than anything, over the years. I got my pinion angle set at 5 degrees down with the S/S springs, and let her rip.
A bodies make GREAT race cars, and Mopar S/S springs work outstanding well into the 9’s.... even on a small tire. Thats fact