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B body 8 3/4 Rear End in an A-Body #1001617
05/28/11 10:05 PM
05/28/11 10:05 PM
Joined: Dec 2010
Posts: 12,375
SoCal
MuuMuu101 Offline OP
I got lucky at Woodward!
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So, since an A-body 8 3/4 rear end is near impossible to find at a good price and condition, what would need to be done to fit a B-Body 8 3/4 under there besides moving the spring perches? If I were to shorten the housing and axle length, approximately how much does it usually cost?

I have heard people leave it the stock length and fit wheels that have about a 7" backspace to it. I guess that could allow you to fit wide wheels and tires in there. Approximately what kind of backspacing would you need with a stock suspension or with a Hotchkis TVS sort of thing? It's hard to find wheels that have a 7" backspace in the back and a 4-4.5" backspace in the front.

Thank you for your replies

Re: B body 8 3/4 Rear End in an A-Body [Re: MuuMuu101] #1001618
05/28/11 10:15 PM
05/28/11 10:15 PM
Joined: Jan 2003
Posts: 25,200
Upper Midwest
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MoparforLife Offline
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Upper Midwest
Move the perches in and use deep back spacing on the wheels. _ I used 5 inch with mine and ran 29.5 X 10.5 15 slicks. Nice thing about running with a B housing and axle is that they will be 4.5 bolt pattern.

Re: B body 8 3/4 Rear End in an A-Body [Re: MoparforLife] #1001619
05/28/11 10:21 PM
05/28/11 10:21 PM
Joined: Dec 2010
Posts: 12,375
SoCal
MuuMuu101 Offline OP
I got lucky at Woodward!
MuuMuu101  Offline OP
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SoCal
Approximately how wide of wheels do you think you can fit under there with a 5" backspacing? Thank you for your reply

Re: B body 8 3/4 Rear End in an A-Body [Re: MuuMuu101] #1001620
05/28/11 10:31 PM
05/28/11 10:31 PM
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Posts: 25,200
Upper Midwest
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MoparforLife Offline
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Mine were 10's in this pic. but actually 8's with 4 inch BS tucked in a little better with a slightly narrower tire.

Re: B body 8 3/4 Rear End in an A-Body [Re: MoparforLife] #1001621
05/28/11 11:05 PM
05/28/11 11:05 PM
Joined: Jan 2003
Posts: 21,674
San Jose,CA
migsBIG Offline
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San Jose,CA
If you can find a 1965-67 b-body rearend, that would be best. Those years, the rearend is 3/4 inch narrow on each side.

Re: B body 8 3/4 Rear End in an A-Body [Re: migsBIG] #1001622
05/28/11 11:20 PM
05/28/11 11:20 PM
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Posts: 8,016
Polson, MT
DoctorDiff Offline
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Polson, MT
A-body 8 3/4" rearends with 5 x 4 1/2" conversion axles are 1 5/8" narrower than '65-'70 B-body rears (total width).

'65-'67 B-body rearends are 3/4" narrower than '68-'70 B-body rears (total width).

Re: B body 8 3/4 Rear End in an A-Body [Re: DoctorDiff] #1001623
05/28/11 11:34 PM
05/28/11 11:34 PM
Joined: Dec 2010
Posts: 12,375
SoCal
MuuMuu101 Offline OP
I got lucky at Woodward!
MuuMuu101  Offline OP
I got lucky at Woodward!

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Posts: 12,375
SoCal
Thanks guys, 3/4" isn't too bad I should be able to work with that Thanks again!

Re: B body 8 3/4 Rear End in an A-Body [Re: DoctorDiff] #1001624
05/28/11 11:35 PM
05/28/11 11:35 PM
Joined: Jul 2010
Posts: 184
Vernon Ct.
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bp27 Offline
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Vernon Ct.
I Have 15 X 8 with 5-1/2 back spacing on a 67 b body dana 60

6655852-duster007.2.jpg (680 downloads)
Re: B body 8 3/4 Rear End in an A-Body [Re: DoctorDiff] #1001625
05/28/11 11:56 PM
05/28/11 11:56 PM
Joined: Jan 2005
Posts: 3,699
Newport, Mi
Evil Spirit Offline
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Newport, Mi
Quote:

A-body 8 3/4" rearends with 5 x 4 1/2" conversion axles are 1 5/8" narrower than '65-'70 B-body rears (total width).

'65-'67 B-body rearends are 3/4" narrower than '68-'70 B-body rears (total width).




That doesn't make sense... If there are 2 different width b body axles (65-67) and (68-70) - how can it be a flat 1 5/8" difference for 65-70 b body axles that you list? There should be 2 figures - (65-67)7/8" and (68-70)1 5/8" narrower or (65-67)1 5/8" and (68-70)2 3/8" narrower, holding the 3/4" difference between the b body model years.


Free advice and worth every penny...
Factory trained Slinky rewinder.........
Re: B body 8 3/4 Rear End in an A-Body [Re: Evil Spirit] #1001626
05/29/11 12:26 AM
05/29/11 12:26 AM
Joined: Jan 2003
Posts: 8,016
Polson, MT
DoctorDiff Offline
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Polson, MT
That was a typo.

A-body 8 3/4" rearends with 5 x 4 1/2" conversion axles are 1 5/8" narrower than '65-'67 B-body rears (total width).

'65-'67 B-body rearends are 3/4" narrower than '68-'70 B-body rears (total width).

Re: B body 8 3/4 Rear End in an A-Body [Re: DoctorDiff] #1001627
05/29/11 12:31 AM
05/29/11 12:31 AM
Joined: Jan 2003
Posts: 21,674
San Jose,CA
migsBIG Offline
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San Jose,CA
Quote:

That was a typo.

A-body 8 3/4" rearends with 5 x 4 1/2" conversion axles are 1 5/8" narrower than '65-'67 B-body rears (total width).

'65-'67 B-body rearends are 3/4" narrower than '68-'70 B-body rears (total width).




that is correct. Hey, it the weekend. Even cass needs a day to relax his brain abit.

Re: B body 8 3/4 Rear End in an A-Body [Re: migsBIG] #1001628
05/29/11 01:56 AM
05/29/11 01:56 AM
Joined: Feb 2010
Posts: 18,493
Granite Bay CA
Kern Dog Offline
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Granite Bay CA
I think MuuMuu has a Dart that he is trying to fit this axle into. The wheel arches are lower than the Duster/Demon/Dart Sport cars.
I have a 67 Dart with a '68 Coronet 8 3/4 axle. I used 15x8 widened rally wheels with 5 7/8 backspace. I was able to fit in a 255 60 tire without rubbing. THAT tire really filled up the wheelwell!

Re: B body 8 3/4 Rear End in an A-Body [Re: Kern Dog] #1001629
05/29/11 02:08 AM
05/29/11 02:08 AM
Joined: Dec 2010
Posts: 12,375
SoCal
MuuMuu101 Offline OP
I got lucky at Woodward!
MuuMuu101  Offline OP
I got lucky at Woodward!

Joined: Dec 2010
Posts: 12,375
SoCal
Quote:

I think MuuMuu has a Dart that he is trying to fit this axle into. The wheel arches are lower than the Duster/Demon/Dart Sport cars.
I have a 67 Dart with a '68 Coronet 8 3/4 axle. I used 15x8 widened rally wheels with 5 7/8 backspace. I was able to fit in a 255 60 tire without rubbing. THAT tire really filled up the wheelwell!




Thanks Frakenduster. You're right! I am just trying to learn more and plan my car out before I buy or do anything with it.

Re: B body 8 3/4 Rear End in an A-Body [Re: MuuMuu101] #1001630
05/29/11 11:08 AM
05/29/11 11:08 AM
Joined: Apr 2010
Posts: 1,216
Under My Car
Mopar_Country Offline
pro stock
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pro stock

Joined: Apr 2010
Posts: 1,216
Under My Car

Re: B body 8 3/4 Rear End in an A-Body [Re: MuuMuu101] #1001631
05/29/11 11:17 AM
05/29/11 11:17 AM
Joined: Feb 2010
Posts: 18,493
Granite Bay CA
Kern Dog Offline
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Granite Bay CA
Heck yeah, dude! I plan out all sorts of car stuff before I turn a wrench. I often even make notes and keep them with me during the build!

Re: B body 8 3/4 Rear End in an A-Body [Re: Kern Dog] #1001632
05/29/11 11:28 AM
05/29/11 11:28 AM
Joined: Mar 2005
Posts: 1,557
Michigan
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Kiddart Offline
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Michigan
I run a B-rear in my A-Bodie and there is no worries. I played with the off set and its awesome. alot cheaper. the problem I had was I could only get dutchman axles at the time so I went with them, most cost effective. I think now randy's sells a set of universal that can be cut to length if you want. my next move will be a Moser modular. wanna buy a complete b-body set up??


Thank you
Kiddart
Re: B body 8 3/4 Rear End in an A-Body [Re: Kiddart] #1001633
05/29/11 11:38 AM
05/29/11 11:38 AM
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Florida
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mopar346 Offline
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Florida
Patiences Muumuu, get your cash ready and keep shopping for an A-body rear, they are out there and can be found at a deal if you are patience and ready when it surfaces. Then you don't have to worry about any fitment or clearance issues, except the normal A-body restrictions anyway.


Careful, your character's showing!
Re: B body 8 3/4 Rear End in an A-Body [Re: MuuMuu101] #1001634
05/29/11 11:58 AM
05/29/11 11:58 AM
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Posts: 22,873
Chicken coop
dustergirl340 Offline
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We got one out of a '73 Satellite for my Duster and had Moser shorten it. Cost around $250 but that was back in 2002. C-bodies are a good source for 8 3/4's.

People want stupid prices for original A-body ones, I've seen 'em for $500 just for the housing.

Re: B body 8 3/4 Rear End in an A-Body [Re: dustergirl340] #1001635
05/29/11 01:43 PM
05/29/11 01:43 PM
Joined: Apr 2010
Posts: 1,216
Under My Car
Mopar_Country Offline
pro stock
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Under My Car
Quote:

We got one out of a '73 Satellite for my Duster and had Moser shorten it. Cost around $250 but that was back in 2002. C-bodies are a good source for 8 3/4's.

People want stupid prices for original A-body ones, I've seen 'em for $500 just for the housing.




Yup, I found an A body complete on CL in the Detroit area for 1200.00. Needless to say I put a B body rear in built with suregrip and 3.55's for under 600.00 for everything. All I did was move the perches in and bolt it up. Works great.

Re: B body 8 3/4 Rear End in an A-Body [Re: Kern Dog] #1001636
05/29/11 04:50 PM
05/29/11 04:50 PM
Joined: Jan 2003
Posts: 21,674
San Jose,CA
migsBIG Offline
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San Jose,CA
Quote:

Heck yeah, dude! I plan out all sorts of car stuff before I turn a wrench. I often even make notes and keep them with me during the build!




That's the smartest thing you can do. You will be suprised how many people will just go and buy parts without researching or bringing notes.

Hey, show up to the mopar alley show early and well see if we can score you something on the cheap.

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