I have a 72 nova and twisted the drive line in half in second gear last weekend when i finally hooked up . its a 10 bold with ladder bars with richmond 456 gears posy, looks like standard axels in it. how do I measure it to See if it is a 8.5 or an 8 ring? If it is a 8.5 does anybody think it will go, or will it last? I also twisted my ladder bars on launch and I want to remove them and install Caltracs. I thought I read on here once, that I can look at the pinion nut and be able to tell what it is. Please all replys welcome, I found a 9" bolt in with 4:56's spooled with 35 spline moser axels for 1,700 bucks, I know its worth it but should I and Do I have to? Sorry power plant is a BBC 427 punched to a 437 around 580 Hp. running a TH400 with trans brake.