Re: A-Body Leaf Springs - why do mine look crooked?
[Re: Kern Dog]
#1238336
05/23/12 09:40 PM
05/23/12 09:40 PM
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Joined: Nov 2006
Posts: 1,460
oklahoma
forphorty
pro stock
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pro stock
Joined: Nov 2006
Posts: 1,460
oklahoma
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Quote:
What if a previous owner had a B body 8 3/4 in there and they just spread the springs wide to fit INSTEAD of relocating the perches?
That's what i'm thinking.
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Re: A-Body Leaf Springs - why do mine look crooked?
[Re: 340duster340]
#1238340
05/24/12 04:33 PM
05/24/12 04:33 PM
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Joined: Aug 2011
Posts: 25
Glendora, CA
MYBD318
member
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member
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Posts: 25
Glendora, CA
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A-body spring perches are 43" center to center
2 cents
Still a teen just a 416
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Re: A-Body Leaf Springs - why do mine look crooked?
[Re: ScottSmith_Harms]
#1238341
05/24/12 04:36 PM
05/24/12 04:36 PM
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Joined: Jun 2006
Posts: 1,152
Colorado
CuriousYella70
OP
super stock
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OP
super stock
Joined: Jun 2006
Posts: 1,152
Colorado
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Quote:
Are you sure its an original unmodified A- body rear end?
It's an A-Body 8 3/4 from a 71 340 Duster a guy in Northern Colorado had. Was told that it was bone stock and had a friend rebuild it. I do know he used big bolt fury axles in it (have the big bolt front end and wanted the big bolt in the rear) but that's not going to change anything on the width of the rear end would it?
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Re: A-Body Leaf Springs - why do mine look crooked?
[Re: MYBD318]
#1238342
05/24/12 04:37 PM
05/24/12 04:37 PM
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Joined: Jun 2006
Posts: 1,152
Colorado
CuriousYella70
OP
super stock
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OP
super stock
Joined: Jun 2006
Posts: 1,152
Colorado
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Quote:
A-body spring perches are 43" center to center
2 cents
I'll have to measure this later tonight when I get home. 
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Re: A-Body Leaf Springs - why do mine look crooked?
[Re: CuriousYella70]
#1238343
05/25/12 12:56 AM
05/25/12 12:56 AM
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Joined: Jun 2009
Posts: 438
Great Lakes Region
abodiesonly1
mopar
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mopar
Joined: Jun 2009
Posts: 438
Great Lakes Region
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Quote:
Quote:
Are you sure its an original unmodified A- body rear end?
It's an A-Body 8 3/4 from a 71 340 Duster a guy in Northern Colorado had. Was told that it was bone stock and had a friend rebuild it. I do know he used big bolt fury axles in it (have the big bolt front end and wanted the big bolt in the rear) but that's not going to change anything on the width of the rear end would it?
If someone used big bolt pattern Fury axles, its not an A Body rear. This is providing no one cut the rear and/or the axles.
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Re: A-Body Leaf Springs - why do mine look crooked?
[Re: abodiesonly1]
#1238344
05/25/12 01:38 AM
05/25/12 01:38 AM
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Joined: Jan 2003
Posts: 27,483
So Cal
autoxcuda
Too Many Posts
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Too Many Posts
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Posts: 27,483
So Cal
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Quote:
Quote:
Quote:
Are you sure its an original unmodified A- body rear end?
It's an A-Body 8 3/4 from a 71 340 Duster a guy in Northern Colorado had. Was told that it was bone stock and had a friend rebuild it. I do know he used big bolt fury axles in it (have the big bolt front end and wanted the big bolt in the rear) but that's not going to change anything on the width of the rear end would it?
If someone used big bolt pattern Fury axles, its not an A Body rear. This is providing no one cut the rear and/or the axles.
I'm going to guess the axles were cut down. The big C-body axles are meaty where the new splines need to go.
And if it was a C-body rear he wouldn't be able to get the rear rims on his car with anywhere near the offset I've seen in pictures of his car.
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Re: A-Body Leaf Springs - why do mine look crooked?
[Re: CuriousYella70]
#1238346
05/25/12 03:51 PM
05/25/12 03:51 PM
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Joined: Jan 2008
Posts: 3,886
Lost and Spaced
bboogieart
master
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master
Joined: Jan 2008
Posts: 3,886
Lost and Spaced
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what was wrong with this statement?
A-body spring perches are 43" center to center.
Should be the only measurement you need for now.
I have mechanical Aptitude.
I can screw up anything.
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Re: A-Body Leaf Springs - why do mine look crooked?
[Re: bboogieart]
#1238348
09/07/12 10:54 AM
09/07/12 10:54 AM
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Joined: Jun 2006
Posts: 1,152
Colorado
CuriousYella70
OP
super stock
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OP
super stock
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Posts: 1,152
Colorado
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Quote:
what was wrong with this statement?
A-body spring perches are 43" center to center.
Should be the only measurement you need for now.
Finally got around to measuring the rearend, had to deal with 4 speed issues first. From the center of the perch stud that goes through the leaf springs, mine measure just under 44" - about 2 marks below the 44" mark on the tape measure. So obviously, this isn't a stock A-Body rearend. Is it a B-Body rear end being so close to the 44" mark?
What's the best solution to fixing this and making the rear end work? I've seen where people just grind off the perches and move them in - is that something I should do? Move them in until they center out at 43"? Thoughts??
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Re: A-Body Leaf Springs - why do mine look crooked?
[Re: CuriousYella70]
#1238349
09/07/12 11:03 AM
09/07/12 11:03 AM
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Joined: Jan 2003
Posts: 75,098
A Banana Republic near you.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,098
A Banana Republic near you.
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Quote:
Quote:
what was wrong with this statement?
A-body spring perches are 43" center to center.
Should be the only measurement you need for now.
Finally got around to measuring the rearend, had to deal with 4 speed issues first. From the center of the perch stud that goes through the leaf springs, mine measure just under 44" - about 2 marks below the 44" mark on the tape measure. So obviously, this isn't a stock A-Body rearend. Is it a B-Body rear end being so close to the 44" mark?
What's the best solution to fixing this and making the rear end work? I've seen where people just grind off the perches and move them in - is that something I should do? Move them in until they center out at 43"? Thoughts??
it's a B body rear more than likely , now WHICH one is the question 66-67 or 68-70 , the 68-70 is wider than the 6566 , but both are wider than an A body .
You could just leave it be, many guys run it like that with no issues , if you believe everything you read on the internet...
Which begs the question , why did it need new cut down axles ? Did it have small bolt pattern axles in it originally ? If so maybe it is an A body rear that someone moved the perches on to put it in a 66-67 B body at one time ???
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Re: A-Body Leaf Springs - why do mine look crooked?
[Re: CuriousYella70]
#1238350
09/07/12 11:22 AM
09/07/12 11:22 AM
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Joined: May 2003
Posts: 15,487
Florida
scratchnfotraction
I Live Here
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I Live Here
Joined: May 2003
Posts: 15,487
Florida
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correct 44" spring perch center are from a early B-body A-body perch centers are 43" centers. measure the backset on your rims. measure from axle flange to axle flange...drum to drum I had a C-body housing cut to A-body specs for large brake axles,it made the whole rear end wider a 1/2" 1/4" each side if the axles are cut to A-body specs 28" then a 4.5 backset on the rim is whats needed the duster/darts have a much bigger wheel opening and will allow a B-body houseing fit in by spreding the springs apart a 1/2" each side this makes the spring look like yours does. sloping outward. i have done this to a few a-bodys. My cut down C-body to A-body spec housing with moser large brake/large wbp axles use a 4.5 backset with the springs on 43" centers. in the dart 7" rim 4.5" BS 245/60/15 the same A-body 8 3/4 bolted in my 88 440 truck 12" rim with 4.5" BS 29x15x15 M/T I wager you have a B-body housing with the 44" spring perch centers. or if it A-body spec axle/housing the perches are set for a B-body and mini tubbing wheel wells. 
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Re: A-Body Leaf Springs - why do mine look crooked?
[Re: CuriousYella70]
#1238351
09/07/12 11:47 AM
09/07/12 11:47 AM
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Joined: Jan 2003
Posts: 5,394
Pikes Peak Country
TC@HP2
master
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master
Joined: Jan 2003
Posts: 5,394
Pikes Peak Country
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Quote:
From the center of the perch stud that goes through the leaf springs, mine measure just under 44" - about 2 marks below the 44" mark on the tape measure.
Using your garden variety home improvement store made in china type of tape measure, that would be 43 7/8" If you have a much earlier model, made in USA type tape, it may be 43 15/16. Using a machinist scale it could be 43 31/32. You'll need to define that level of accuracy to best figure out spring spacing, pad location, and wheel offset to create the best combination. Telling a welder to put the pads two ticks off of something won't work.
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