8 3/4 B-body diff in a A-body
#60684
05/20/08 11:16 PM
05/20/08 11:16 PM
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Anonymous
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just picked up a pre-1970 B-body 8 3/4 diff. i know the perches will have to be moved. it is only a 1.5" per side wider track, so my question is, can i still use the stock offset factory rims? thanks.
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Re: 8 3/4 B-body diff in a A-body
[Re: DoctorDiff]
#60686
05/20/08 11:51 PM
05/20/08 11:51 PM
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awesome i was doin some ruff measurements, and it looks like a 275/60/15 will fit with that diff in my duster no problem.
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Re: 8 3/4 B-body diff in a A-body
#60687
05/22/08 10:09 AM
05/22/08 10:09 AM
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Quote:
i was doin some ruff measurements, and it looks like a 275/60/15 will fit with that diff in my duster no problem.
does that sound about right with a 15x8 rim?
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Re: 8 3/4 B-body diff in a A-body
#60691
05/22/08 02:57 PM
05/22/08 02:57 PM
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Joined: Feb 2003
Posts: 4,204 Fort Worth, TX
Clair_Davis
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Joined: Feb 2003
Posts: 4,204
Fort Worth, TX
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Quote:
just picked up a pre-1970 B-body 8 3/4 diff...
Just how "pre-1970" is it? The 68-70 rears were wider than the 65-67 units, something like an extra 1/2" per side. On a fat-fender Duster, you MIGHT be able to get away with a 17x9 or 17x10 Mustang-type wheel with ~6.4" of backspace. If you're using the narrower 65-67 unit, you may not be able to tolerate that much BS, but there are other wheel options in the Mustang family.
I'm running the 65-67 rear in my Valiant, and with 17x8-5.7"BS wheels and 245/45 tires, I've got a fat inch to the springs on the inside and ~1/2" to the outer wheel well (slightly massaged, not rolled).
Clair
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Re: 8 3/4 B-body diff in a A-body
[Re: AndyF]
#60692
05/22/08 07:04 PM
05/22/08 07:04 PM
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Use Mustang 17x8 rims with the 5.72 backspacing.
NOT even if carman electra promised to rock my work right after. if i wanted a rustang parts, i woulda bought one.
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Re: 8 3/4 B-body diff in a A-body
[Re: AndyF]
#60694
05/22/08 07:10 PM
05/22/08 07:10 PM
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Your loss. Watch the tailights of the guys running the 17 inch tires leave you in the corners.
3 words.. throttle induced oversteer. thats all i need. don't get me wrong, i appreciate the input.. that style isn't for me though.
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Re: 8 3/4 B-body diff in a A-body
[Re: Clair_Davis]
#60695
05/22/08 07:16 PM
05/22/08 07:16 PM
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Quote:
Quote:
just picked up a pre-1970 B-body 8 3/4 diff...
Just how "pre-1970" is it? The 68-70 rears were wider than the 65-67 units, something like an extra 1/2" per side. On a fat-fender Duster, you MIGHT be able to get away with a 17x9 or 17x10 Mustang-type wheel with ~6.4" of backspace. If you're using the narrower 65-67 unit, you may not be able to tolerate that much BS, but there are other wheel options in the Mustang family.
I'm running the 65-67 rear in my Valiant, and with 17x8-5.7"BS wheels and 245/45 tires, I've got a fat inch to the springs on the inside and ~1/2" to the outer wheel well (slightly massaged, not rolled).
Clair
741 pumpkin 54.5" backing plate to backing plate and 46" perch to perch. no idea what year it is.
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Re: 8 3/4 B-body diff in a A-body
[Re: RobX4406]
#60698
05/22/08 09:39 PM
05/22/08 09:39 PM
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whatever the case.. its still only 1.5" longer per side. not a big deal, easy to mod the perches, and plenty-o tire room to boot afterwards.
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