Well, I made a post that I was looking for a borg & warner 9 bolt in the classified section but then reading some other posts I'm not so sure if that is what I want now or not.

I was told by someone locally that it's a good rear end to run, and would meet specifications to run on some road coarses in the area. So that is one thing to keep in mind, I don't plan to do that a lot, but I may do it some for fun so need a rear end that will generally meet specifications for them.

My motor is going to be a 350 performance upgrade, pushing around 350 HP at the flywheel. I've got a T56 transmission that I'm going to be putting in as well.

So the next thing on my list is to get a rear end that can handle the extra power. Not sure how long the stock rear end in my 86 z28 will stand up to it. And I read the b&w 9 bolt was only rated to 295 hp. Granted I read a few say that it's underrated, but I'd like to be sure.

I want disc brakes, and I want to be able to use my 85-87 Iroc wheels without them poking out the sides of the car. Gearing wise I was thinking 3.73 gears but I'm open to suggestions there as well.

 

For a junkyard rear end, a 90-92 is better than the older third gen diffs because they have 28 spline axles however you can always upgrade your old diff to 28 spline axles but would need to buy a 28 spline posi as well.

A fourth gen diff isn't any different in strength than the 90-92 diffs.

That's your only choices for a junkyard diff. You can spend a lot of money to make them stronger but by the time you're done, you'll still have a tiny ring and pinion. For not much more than the cost of all the upgrades, you can step up to an aftermarket diff. A basic 9" package is around $1000 but that's just the housing and axles. You provided everything else. You can also go to a 12 bolt or Dana 60 diff.

Simplest solution is to run what you currently have. The 10 bolt has been broken by street cars and has survived fast drag racing abuse. It's a coin flip as to if it will last or not. If it does fail, then you can decide on how much diff you need.

 

just letting the op know that i busted my stock nine bolt a few months ago with a bolt on l98 stalled and built auto car.. but had a fresh engine it in.. The rear had alot of miles and i pushed the **** out of that car.. now im running a ls1 torsen rear end... i say if its a daily driver then it should be ok.. but with sitcky tires and a manual i hope you have AAA or something.. that card will be your best friend at that time...

 

Lol yeah, I have road side assistance on the camaro through my insurance. I actually sprung for the "plus" upgrade to it, that covers towing for up to 100 miles to the destination of my choice.

 

Doesnt it depend on the gear ratio you have? some have 2.77, 3.08 3.45

I have a 3.45 disc 9 bolt sandblasted, painted- for sale

I beat the crap outta my ten bolt. I only wanted the 9 bolt bc i t had disc brakes. I read some things that said a 9 bolt was stronger bc it was smaller as in the size of the pumpkin.