choosing correct shocks

Probably use some mancinni xhd leaf springs. Don't need a all out race setup for my power. Gonna build a 400 to 425 horse 360. Use a good 9 inch slick with 355 gear

I have the xhd springs in my '70 duster with the cheap Summit drag shocks set at 90/10 in the front 50/50 in the rear and a pinion snubber..car 60' in the 1.40's with my 416.. 1.60's with my 360..not to shabby:D:D