Rear housing Question
 

I'm considering building an F body Mopar for Stock. The rear can be replaced with any corporate housing as I understand, but the new housing has to match the width dimension of the old one exactly, correct?

Thanks!

Re: Rear housing Question
 

You might be interested in this thread over on Moparts.com:

https://board.moparts.org/ubbthreads...ml#Post3141895

Re: Rear housing Question
 

The rule book reads as follows:
REAR END
Original rear end may be replaced with another from the same
automobile manufacturer; truck rear end prohibited. Aluminum
center section permitted only on vehicles that were originally
equipped with same. Distance between backing plates may not
be changed. Any gear ratio that fits third-member case or housing
permitted. Limited-slip or ratchet-type rear ends permitted.
Reinforcement of spring perch permitted. Spools permitted only
with aftermarket axles. Aftermarket axles not required for front
wheel-drive vehicles. Larger brakes may be used. Replacement
rear end may be narrowed or widened to obtain original rear-end
width. Bracing or beefing up the rear-end housing permitted.

Make sure you don't use a Chinese tape measure...:D

Re: Rear housing Question
 

That's actually my thread. Lots of not so good answers and maybe some good.

Re: Rear housing Question
 

we have ran 2 F-bodies in stock, both used the 8 3/4 housing with a back brace on it.
As I understand it, you can also run a Dana 60.

I believe the 8 3/4 used on the B-body from 1964-1967 is the correct width.

Re: Rear housing Question
 

That's funny. Yes you have to separate the wheat from the chaff.

Re: Rear housing Question
 

unless you are going to make some hp that can chew up an 8 3/4", there would be no reason to go to a dana 60.

Re: Rear housing Question
 

I want an 8-3/4 because I have a bunch of crnter sections in various ratios.

Thanks for all the replies!

Re: Rear housing Question
 

what combo are you going to run?

Re: Rear housing Question
 

Bigshow you have a PM.

Re: Rear housing Question
 

V/SA 225 2 bbl. I think I have enough stuff laying around I can run the index maybe.

I turn 65 in 3 weeks. It's going to be my retirement project.

Re: Rear housing Question
 

You could even run the 8 1/4 in that if you could find
the needed parts.

My 80 Mirada 318 O/SA ran a 8 1/4 forever without breakage!

Re: Rear housing Question
 

congrats on your retirement. i have tons of family in chi town
when i looked at this combo and the 8.25 rear. the deepest gear was a 4:88

Re: Rear housing Question
 

With the power level and weight you will have I would consider a 8 3/4 Detroit locker. The Locker for the 489 case fits up to 4.56 gears.
Most of the time a Locker will have a spool beat on MPH. 30 spline gives you plenty of choices in Stock or stock re-splined axels That
are budget friendly and plenty strong. If you do go all out on axels a 30 spline has a weight advantage.
I'm not sure, but you might even find a gun drilled 30 is available.
.02 for free

Re: Rear housing Question
 

I had thought about the 8-1/4, but then I would be back to starting at 0, I have no parts for one.

This is kinda going to be a "dime rocket" but more likely a "50 cent rocket".

Thanks for all the replies.

Re: Rear housing Question
 

if you are going to use a spool, measure what axles lengths you require. i may have a free set of aftermarket axles