Thanks Craig, I am learning quickly that I can rely on you for sensible build knowledge. It will
not be driven gently, so needs to be strong.
I know from my younger days driving a string of V8 Fords how tough the 9" is, but I had sort of discounted it because it is heavier than the Commodore, and more expensive to buy. I can get a VN/P/R rear end from the wreckers for $200 - $250 disc to disc. Haven't seen any LX 9 inchers anywhere near that cheap. Then if I use VT fronts, I have all Commodore stud pattern with a huge choice of wheels and tyres. (Still not sure if I need to change the master cylinder though.)
The other advantage of a 9" of course is it is quick and easy to change centres. Not an option with the C'dore diff, but I don't plan to change it out too often. It will be set up as a daily driver with a four speed auto and highish diff ratio for economy. Figure I have plenty of power with the LS1, our SS is no slouch, and it is almost double the weight.
Regards
Garry