71 scamp build, need direction

Thanks for the advice 1970Duster. I think I'll go the 8.25 route. So the only mod I will have to do is driveshaft length? Also, I found out the Hotchkis suspension kit requires 3" axle tubes so the 7.25 would have been a no go, does the 8.25 have a 3" axle tube?