A body rear ends/ wheel off sets
#1217337
04/17/12 01:33 AM
04/17/12 01:33 AM
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Joined: Jan 2006
Posts: 572
Portland , Oregon, United Stat...
smokes
OP
mopar
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OP
mopar
Joined: Jan 2006
Posts: 572
Portland , Oregon, United Stat...
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As the title says please post your A body rear end specs/ wheel offsets/ tire sizes. I just got a 71 Duster and am trying to figure out what sizes for things I need in the rear end. I am going with a 489 case 8 3/4 for my car since it will have a 440 in it. I have an 8 3/4 housing that needs to be shortened to fit the A body since actual A body rear ends are next to impossible to find. Since it needs to be shortened no matter what I am wondering if it is possible to get a large tire under the rear stock or if I should shorten the rear end to get a bigger tire under it so I can keep traction... What are you guys running for specs?? If you also have pictures that would be awesome to!
Looking for a clean w150 or w200 **72-80 body style In the Pacific Northwest**
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Re: A body rear ends/ wheel off sets
[Re: smokes]
#1217338
04/17/12 01:42 AM
04/17/12 01:42 AM
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Joined: Jan 2003
Posts: 70,126
Here
DirectSubjection
Tacohead. The First and Only
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Tacohead. The First and Only
Joined: Jan 2003
Posts: 70,126
Here
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I run the standard combo of an A-body 8-3/4 rear ($250 i paid for it) with aftermarket axles from DrDiff that take the large bolt pattern wheels and 11" brakes. These axles do set the wheels out a bit farther than the stock sbp a-body set up. I run 275/60/15s on 15" x 8" rims with 4.5" back spacing, dustergal and 340six have this same set-up too.
There is a b-body rear that's only a bit wider and will bolt into a stock a-body spring setup if you pull the springs apart a little bit.
Last edited by DirectSubjection; 04/17/12 10:34 AM.
Ride eternal, shiny and chrome
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Re: A body rear ends/ wheel off sets
[Re: DirectSubjection]
#1217339
04/17/12 01:55 AM
04/17/12 01:55 AM
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Joined: Jan 2003
Posts: 4,247
Newfoundland
codfish
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master
Joined: Jan 2003
Posts: 4,247
Newfoundland
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Stock wheel tubs or mini tubbing it? You can get wheels in just about any backspacing to position the wheel/tire combo where ever you want in the wheelwell. Seeing as how you will be narrowing the rear anyhow, why not get the widest/biggest tire you can fit, then get a wheel to fit the tire. THEN, get the rear narrowed to the width you need. That's the route I went. Mini tubbed. Dana narrowed to 53" total width. 10x15" wheels with 5.5" backspacing and 325-50-15 rubber. Hope this helps.  
Last edited by codfish; 04/17/12 02:02 AM.
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Re: A body rear ends/ wheel off sets
[Re: smokes]
#1217343
04/17/12 03:53 PM
04/17/12 03:53 PM
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Joined: Sep 2004
Posts: 833
Marietta, GA
Joatha
super stock
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super stock
Joined: Sep 2004
Posts: 833
Marietta, GA
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I'm (going to be) running a B-body 8.75 under my 68 Barracuda (convertible). I am also moving the springs inbound .5" on each side. I had the perches moved on the B-body rear end already (removed and re-welded).
I will be using Mustang wheels (94-02?) with a 5.72" offset.
I haven't fit it all up yet. But, that is supposed to work together just fine. When I did the measuring, I thought the tires were going to be a bit too close to the springs and that is why I went ahead and moved everything inward .5" on each side.
1966 Barracuda
1968 Barracuda convertible
1930 Ford Model A (soon to be hemi equipped)
2006 Dodge 3500 4X4 CTD Quad Cab
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Re: A body rear ends/ wheel off sets
[Re: codfish]
#1217345
04/17/12 08:34 PM
04/17/12 08:34 PM
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Joined: Jun 2005
Posts: 4,041
michigan woods
imfixinmopars426
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master
Joined: Jun 2005
Posts: 4,041
michigan woods
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Quote:
Stock wheel tubs or mini tubbing it?
You can get wheels in just about any backspacing to position the wheel/tire combo where ever you want in the wheelwell. Seeing as how you will be narrowing the rear anyhow, why not get the widest/biggest tire you can fit, then get a wheel to fit the tire. THEN, get the rear narrowed to the width you need.
That's the route I went.
Mini tubbed. Dana narrowed to 53" total width. 10x15" wheels with 5.5" backspacing and 325-50-15 rubber.
Hope this helps.
................THAT LOOKS WICKED!!!...love the color too!! 
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Re: A body rear ends/ wheel off sets
[Re: 1974 474 Duster]
#1217347
04/18/12 02:05 AM
04/18/12 02:05 AM
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Joined: Apr 2012
Posts: 1,235
Phoenix, AZ
Jjs72D
Deep in the closet
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Deep in the closet
Joined: Apr 2012
Posts: 1,235
Phoenix, AZ
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Quote:
With a 71 Duster, use an B-body 8 3/4. The extra width is great for tire clearance. The spring perches are an 1" wider. Put 1 side in place and you can give a little tug and it will fall into place. Plus with a B-body rear it already has the big bolt circle and who knows may have 11" brakes. See ya, Ken 
Man, I have read this before and I don't like it. Now the leaf springs have more side tension. The shackles on these cars are pretty measely, and it seems that putting an additional strain on already worn shackles and bushings may be asking for trouble. Imagine what happens to the leaf springs on bumpy roads, running through their range of motion. If one shackle fails, the car will be difficult to control. I know that not everyone has access to a welder, but spending $50-$75 at a shop to properly relocate the pads seems like money well spent. Are there offset shackles made for A body cars? If there are, then maybe this idea isn't so bad.
Jeff
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Re: A body rear ends/ wheel off sets
[Re: Jjs72D]
#1217348
04/18/12 09:00 PM
04/18/12 09:00 PM
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Joined: Jan 2006
Posts: 572
Portland , Oregon, United Stat...
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mopar
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OP
mopar
Joined: Jan 2006
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Portland , Oregon, United Stat...
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Quote:
Quote:
With a 71 Duster, use an B-body 8 3/4. The extra width is great for tire clearance. The spring perches are an 1" wider. Put 1 side in place and you can give a little tug and it will fall into place. Plus with a B-body rear it already has the big bolt circle and who knows may have 11" brakes. See ya, Ken
Man, I have read this before and I don't like it. Now the leaf springs have more side tension. The shackles on these cars are pretty measely, and it seems that putting an additional strain on already worn shackles and bushings may be asking for trouble. Imagine what happens to the leaf springs on bumpy roads, running through their range of motion. If one shackle fails, the car will be difficult to control. I know that not everyone has access to a welder, but spending $50-$75 at a shop to properly relocate the pads seems like money well spent. Are there offset shackles made for A body cars? If there are, then maybe this idea isn't so bad.
Jeff
Yeah. I hear you on this. It had me wondering as well even though it could potentially work.
Looking for a clean w150 or w200 **72-80 body style In the Pacific Northwest**
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Re: A body rear ends/ wheel off sets
[Re: Kiddart]
#1217350
04/19/12 04:21 PM
04/19/12 04:21 PM
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Joined: Jan 2006
Posts: 572
Portland , Oregon, United Stat...
smokes
OP
mopar
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OP
mopar
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Portland , Oregon, United Stat...
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Bump.. I was thinking I might see how much it would be to have an extra housing narrowed to stock specs. I would rather have it narrowed even more but don't have the money to buy wheels right away as well... I believe the biggest tire that can fit on an A body rear end stock is a 275/60/15??
Looking for a clean w150 or w200 **72-80 body style In the Pacific Northwest**
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Re: A body rear ends/ wheel off sets
[Re: smokes]
#1217351
04/27/12 01:41 PM
04/27/12 01:41 PM
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Joined: Jan 2006
Posts: 572
Portland , Oregon, United Stat...
smokes
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mopar
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mopar
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Portland , Oregon, United Stat...
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When I do buy some wheels I am thinking of going a 17" up front and an 18" out back. I like the rocket brand wheels or the american racing torque thrust d. Any body have pictures and specs of their A body with after market wheels?
Looking for a clean w150 or w200 **72-80 body style In the Pacific Northwest**
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Re: A body rear ends/ wheel off sets
[Re: B_Body_Bob]
#1217352
04/27/12 03:51 PM
04/27/12 03:51 PM
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Joined: Apr 2005
Posts: 12,271
Overpriced Housing Central
RobX4406
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I Live Here
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Posts: 12,271
Overpriced Housing Central
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Quote:
Quote:
With a 71 Duster, use an B-body 8 3/4. The extra width is great for tire clearance. The spring perches are an 1" wider. Put 1 side in place and you can give a little tug and it will fall into place. Plus with a B-body rear it already has the big bolt circle and who knows may have 11" brakes. See ya, Ken
I did the same thing. Loosen up the spring eye bolts, spread it a lttle and the rear will bolt right in.
Widths are here http://www.mymopar.com/index.php?pid=73
Bob, lose that POS chart... it's not correct.
Want correct width, go to the tech section and look at the one that has axle lengths.
http://www.moparts.org/Tech/Archive/axle/16.html
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Re: A body rear ends/ wheel off sets
[Re: smokes]
#1217353
04/27/12 05:34 PM
04/27/12 05:34 PM
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Joined: Jul 2007
Posts: 1,682
Philadelphia
radar
top fuel
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top fuel
Joined: Jul 2007
Posts: 1,682
Philadelphia
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Quote:
Bump.. I was thinking I might see how much it would be to have an extra housing narrowed to stock specs. I would rather have it narrowed even more but don't have the money to buy wheels right away as well... I believe the biggest tire that can fit on an A body rear end stock is a 275/60/15??
I have a stock 72 demon 8.75 car with bfg 275/60-15 TA radials on it. They are barely rubbing the leaf springs and only clear the wheel well lips without work because the SS springs lift the lip above the tire. I ended up using 3/16" spacers behind the wheels to stop rubbing. This is with wheel vintiques 15x8 rally rims, standard offset.
My point is if you want to run the 275 and you are going to set up the springs and perches from scratch why not give yourself an extra 1/2"? Or even take the leafs in even with the frame rails. That way you can get a bigger tire later.
Good Luck
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