So I've saved enough cash now to buy the parts to rebuild the rear on my 87 IROC....buying a master bearing kit, eaton 3 series posi, richmond 3.73 gears, moser 28 spline axles, and a new diff cover. Looking to eventually put 300-350 hp (flywheel) motor in. I know the 7.5 rear is weak, but I shouldn't have a problem in this horsepower range, would I?

 

Richmond gears are cut a lil different and have more noise than motive gears do. So I'm told. I have installed a bunch of both and its true for the most part..

 

This is the cover Im using .
http://www.jegs.com/i/L.P.W./619/301-7.5G/10002/-1
I don't see how you can go wrong with this one.
Congratulation,your going to love the new setup.

 

I think youll be fine. Its clutch dumps and sudden traction situations that kill diff's. With all the things you listed and the cover you should be golden.

 

Hey thanks guys. Another quick question..the rebuild kit. Would this be the correct one I can use?

http://www.drivetrainspecialists.com...duct-1783.html

And do I need to buy spider gears or are they in the install kit? Sorry for the noob questions. First time messing with a rear end.

 

Well I ordered the Motive gears instead of the Richmond since I've read from a alot of the posts here that they're quieter. Oh and disregard the spider gear question. Looked it up and saw they're inside the posi. Thanks again guys.

 

Here's a list of what your going to need. I see you have most of that,you still need the axle bearings and seals and a professional to install it all .If you don't have one already.
1)Master bearing kit
2)Axle bearings and seal
3)28 spline, 3 series ,Eaton Posi.
4)28 spline axles
5)L.P.W. Cover “no gasket,only silicone”
6)ring and pinion
7)installation by a “professional”

1.