Best Upper a arms for 72 a body

The 11.75’s use a 73+ spindle, so they’re large ball joint and you’ll need large ball joint UCA’s. Or adaptors, but if you need UCA’s anyway just get the large ball joint variety.

QA1’s tubular UCA’s are really nice, and you’ll be able to get more caster than with a set of reproduction stamped UCA’s.

Would you happen to know what part number works with the dr diff 11.75" kit. I see summit but doesnt say which are big and small balljoint.