80 series rear diff/suspension - issues?

[Clint]

I'm thinking of swapping in an 80 series rear diff with it's 4-link + panhard setup. From what I've seen they go pretty well both on & offroad & I've never heard of anybody breaking one.

Given we'll have the option of changing stuff as we do it, should we just copy the geometry of all the existing control arm lengths & angles or ? Is there anything that needs reinforcing, modding or changing? Probably not too many people that have messed with this stuff but I thought I'd put it out there in case.

Cheers
Clint