550-600HP 4spd suspension help

my friend has a 408 stroker in the 500/500 range with a 4 speed and the car hooks well and the weakest link is the axels he launches at 3600 and all is well .he wanted to inprove his 60ft so he did a 4000 launch twisted the axel off every time with drag radials the stiff side walls dont asorb shook like a slick .a soft wall slick will help with breakage .


ladder bars?

they take all the give out of the springs, and leave you with twisted axles. then if you put big axles they will twist the axle tubes instead lol.

so best bet:
get a dana set it up right either go old school (ss springs pinion snubber) or go new school (calvert coil over setup)

dont try to bandaid the old school with ladder bars.

also knew a guy with a 4900 pound pickup with a 700hp big block with nitrous fogger etc. he was ripping dana 60's up. they will only take so much abuse, then you have to go bigger.

lighter car they last longer.