What rear end do I need?

I have about 430hp in my 68Barracuda,
and an A833
and an 8.75.
and 295/50-15 BFG T/As, you know, the junkiest tires in the world...... they say.
And I'm on the third ring gear.
All street.
Also on my 4th trans, second driveshaft,second shifter, second clutch and about 5th clutch disc. But still on first SureGrip.Hyup nice engine for sure, but the attrition is a bit of a concern.

There are two things that kill the rears; 1) shock, and 2) peg-legging