Rear end advice for racing with a 4 speed

33IMP said

450 hp with a 8 3/4 is do-able with an auto trans. With a four speed I would plan on a Dana 60 or Ford 9". A Ford rear might not help resale value (if that means anything) but a Dana certainly will.
You can spend money on the 8 3/4 to make it stronger, but it still might not be strong enough, and upgrades are expensive.
If it were me? Id get a strange 60, and sell the 8 3/4 before you break it again.

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When the clutch is right for a dead hooking manual trans radial car, the hit on the drivetrain will be softer than with an automatic. I've ran low 5.70's with 1.30 60's on radials with 28 spline axles in an un-braced chevy 10 bolt housing, using an overkill 800hp clutch that was 'tamed. Only failure was a twisted driveshaft, that was when I un-hooked the 'tamer for a with/without test back in 2013. Instant failure without the 'tamer hooked up...



Same 28spl axles until Nov last year, then only retired because the driver's side axle/tube was severely bent in a near head-on collision.

Grant