Recommended 8/34

The sure grip will interchange in all 3 cases,the gears themselves are by case only,be very careful running those adapters I have shredded a couple sets in the past,put the a-body rear in and redrill the axles to big bolt pattern and you will have an axle with 2 patterns,there is a fella on here that has a set for sale already to go...unless your pushing 500+ hp /torque then run the 741's they will take alot more than you think,good springs and bracing the housing/tying frame rails will make any 3rd member live alot longer life,even the 8 1/4 was used for testing by Ma Mopar in a 400 low comp bblk duster with 4.30's,10''slick ran mid to hi 11's,the R/T Dakotas have 8 1/4 rears and they are heavy trks,had one so I know how tough they are,never broke any of them and trk had a fresh 360mag slightly modified ran 13.60's...you can break anything thats already worn out to begin with...