550-600HP 4spd suspension help
I would use the stock springs clamped together with spring ties and a Pinion Snubber...... 90/10 Shocks upfront. Adjustable shocks in the rear.
or
Caltracs with their mono leafs, Adjustable rear shocks and 90/10's up front.
Option #1 is about $400.00 with all parts
Option #2 is about 1K with all parts.