Bolt in 4-link or mono leaf springs

If it hasn't already been said, great double adjustable shocks are important at your power level. If possible, pick shocks that can he used with what you have now, and also be able to move to a different suspension system.
What a lot of guys don't see is the tremendous torque applied to the rear housing at the hit. If you have 700 ft lbs at the crank,, it is 1400 coming out if the converter, times the total gear ratio.a 1.45 low x 4.56 gears is 11.17 times that 1400, or approximately 15,000 ft lbs trying to twist that housing, and the shocks have to control it . With a 20 inch front segment on leaf springs, I takes a lot of shock to slow it down enough . So a call to the tech people to discuss your true needs is important. It might save you from changing to better shocks four times before getting it right like i did