If you go with a S/S spring, You'll want an adjustable pinion snubber (American Muscle makes a nice unit), drag radials for the street, extra long shocks, and a 90/10 shock up front. You will also want to move as much weight to the back as possible, especially with that wheelbase. The S/S springs come in A body front length so you'll need to install longer front extensions. It's four nuts per side. Dr Diff in Montana has some really nice custom made units that are powder coated and appear to be better quality than Mopar performance units. I ran regular A-body springs (5 and 6 leaf) with long front hangers on a 66 coronet 440 4-speed about 20 years ago. I adjusted the pinion snubber for zero clearance. That car lifted like it was a rocket blasting off. It was very cooooooool.
Keep this in mind, the front of the car will need to come up at the same time as the back or even before. If it's late, it won't work.
Dr Diff: Cass Eslick
[email protected]
(406)883-4772
Quality Body Shop Drivetrain
110 Division Street East
Polson, MT 59860