I'm concerned about my rearend on my 85 Cutlass. I have a 350 motor and it's getting bored .30 over with the original heads shaved 10,000, 750 Holley Duel Feed Double Pump Carb and 292 Cam. My rearend is a 10 bolt 7.5 series. Does anyone else have similar components or comments that may ease my mind. I would like to put a mini spool in, so I can have positive traction. Any info is highly appreciated.

 

The 7.5 is pretty weak. There are no inexpensive alternatives, however. Either spend the money for a 442/GN 8.5" or spend the money for a G-body 9" housing. The A-body axle swaps are not well engineered in my opinion and require rear wheels with custom offset. By the time you're done buying the control arms, the A-body axle, and the custom wheels, you might as well have just bought the right axle to start with.

What are you plans for the car? A spool is a really bad idea on the street unless you never plan to turn a corner. If you do, get a good limited slip unit.

 

I've located a 10 Bolt posi from a 71 Cheville with 373 Gears on the internet and would like to know if this would work on my G-Body Cutlass? Thanks for all replys.

 

I don't think it will bolt in ...

You might call carson auto wrecking (310) 835-7291 and ask about interchange ...

 

Better to use one of these: http://www.tomsdifferentials.com/catalog.asp?pg=40

Chevelle is an A body.

From post #2:
The rest of the post is well worth reading.

Norm

 

Go back and read my first post in this thread.

 

Ok, Thanks Mr. Joe I'll look further. I just plan on driving it on occasionlly around town.