Posted By: wedgeheaded
rear end swap question - 07/08/14 01:12 PM
I would like to swap an A body 8 3/4 into my 80 stepside. What years have the 5 on 4 1/2 BP?
rear end swap question
Posted By: buildanother
Re: rear end swap question - 07/08/14 02:23 PM
No A body had that bolt pattern on the 8 3/4.
Posted By: scratchnfotraction
Re: rear end swap question - 07/08/14 03:54 PM
none of the stock a-body 8 3/4 have large brakes/large wbp
I would stay away from the A-body 1 3/4" skinny brake/drums.
I had a housing cut to A-body specs and used a set of Moser custom alloy axle with the large brake off set with 5 on 4.5 wbp. I used 11x2.5 brakes/drums off a 73 newport.
if you find a early A-body 8 3/4 with keyed axles/drums you can swap in a set of flanged axle like the Moser or DocDiff axle packages with large brakes. use a later model chunk. IIRC
have a larger housing cut to A-body specs and if you find a set of axles that are not tapperd you can have them cut resplined.
you can redrill the A-body sbp axle/drums
if some other axles are not out of the ?
a 94 jeep cherokee 8 1/4 just needs the perches welded on bottom of axle tub to go on top of the spring.
it shares the same 43" perch centers axle under spring and can be used to line up the new pads on the bottom of tube for axle over spring.
this should get you the same width as the A-body 8 3/4 in the trucks to tuck 12" rims in the fenders..double check BS on rim. with jeep axle
a C-body 8 3/4 is same width as a truck housing, needs perches moved.
B-Body & E-body will tuck 10s nicly also.
but the A-body with 12" running 29x15x15 is sweet, IMHO.
I would stay away from the A-body 1 3/4" skinny brake/drums.
I had a housing cut to A-body specs and used a set of Moser custom alloy axle with the large brake off set with 5 on 4.5 wbp. I used 11x2.5 brakes/drums off a 73 newport.
if you find a early A-body 8 3/4 with keyed axles/drums you can swap in a set of flanged axle like the Moser or DocDiff axle packages with large brakes. use a later model chunk. IIRC
have a larger housing cut to A-body specs and if you find a set of axles that are not tapperd you can have them cut resplined.
you can redrill the A-body sbp axle/drums
if some other axles are not out of the ?
a 94 jeep cherokee 8 1/4 just needs the perches welded on bottom of axle tub to go on top of the spring.
it shares the same 43" perch centers axle under spring and can be used to line up the new pads on the bottom of tube for axle over spring.
this should get you the same width as the A-body 8 3/4 in the trucks to tuck 12" rims in the fenders..double check BS on rim. with jeep axle
a C-body 8 3/4 is same width as a truck housing, needs perches moved.
B-Body & E-body will tuck 10s nicly also.
but the A-body with 12" running 29x15x15 is sweet, IMHO.
Posted By: wedgeheaded
Re: rear end swap question - 07/08/14 04:55 PM
Quote:
none of the stock a-body 8 3/4 have large brakes/large wbp
I would stay away from the A-body 1 3/4" skinny brake/drums.
I had a housing cut to A-body specs and used a set of Moser custom alloy axle with the large brake off set with 5 on 4.5 wbp. I used 11x2.5 brakes/drums off a 73 newport.
if you find a early A-body 8 3/4 with keyed axles/drums you can swap in a set of flanged axle like the Moser or DocDiff axle packages with large brakes. use a later model chunk. IIRC
have a larger housing cut to A-body specs and if you find a set of axles that are not tapperd you can have them cut resplined.
you can redrill the A-body sbp axle/drums
if some other axles are not out of the ?
a 94 jeep cherokee 8 1/4 just needs the perches welded on bottom of axle tub to go on top of the spring.
it shares the same 43" perch centers axle under spring and can be used to line up the new pads on the bottom of tube for axle over spring.
this should get you the same width as the A-body 8 3/4 in the trucks to tuck 12" rims in the fenders..double check BS on rim. with jeep axle
a C-body 8 3/4 is same width as a truck housing, needs perches moved.
B-Body & E-body will tuck 10s nicly also.
but the A-body with 12" running 29x15x15 is sweet, IMHO.
Some how I had it in my head that the later, (post 72) duster, dart sports. etc, had the 4.5 BC.
Posted By: Cooter
Re: rear end swap question - 07/08/14 05:53 PM
They do.
They just don't have 8 3/4s.
They just don't have 8 3/4s.
Posted By: wedgeheaded
Re: rear end swap question - 07/08/14 07:14 PM
Quote:
They do.
They just don't have 8 3/4s.
OK. What rearends do the later A's have? 43" spring centers? How wide? School me.
Posted By: scratchnfotraction
Re: rear end swap question - 07/08/14 09:30 PM
Quote:Quote:
They do.
They just don't have 8 3/4s.
OK. What rearends do the later A's have? 43" spring centers? How wide? School me.
IIRC the later 72-74 A-body 8 3/4 has the larger brakes with the 4" on 5 wbp
a later 73-75 Duster/Dart A-body can have the 7 1/4 or 8 1/4 with the large brakes and 4.5" on 5 wbp all 43" perch centes. any 73-75 A-body 2 or 4 door cars.
the early B-body is close and can fit A-body with perches on 44" centers = spred the springs 1/2" each side but width is a tad wider for A-body.
but could be worked out in a truck ez-pz with back set on rims.
FYI.you could use a stock width truck axle with a 10" rim with 7.5 backset to tuck a 29x15x15 M/T in the fenders with some tubb work..looks like stock rim but has lots of tire in the fenders.
this is why i look for the 94 jeep 8 1/4 axles and looking for 1 with disc brakes next project i do.
I take it you want to tubb it for fattys with the A-body 8 3/4 correct? that will use a 12 wide 4.5 backset rim
Posted By: wedgeheaded
Re: rear end swap question - 07/09/14 12:49 AM
Quote:Quote:Quote:
They do.
They just don't have 8 3/4s.
OK. What rearends do the later A's have? 43" spring centers? How wide? School me.
IIRC the later 72-74 A-body 8 3/4 has the larger brakes with the 4" on 5 wbp
a later 73-75 Duster/Dart A-body can have the 7 1/4 or 8 1/4 with the large brakes and 4.5" on 5 wbp all 43" perch centes. any 73-75 A-body 2 or 4 door cars.
the early B-body is close and can fit A-body with perches on 44" centers = spred the springs 1/2" each side but width is a tad wider for A-body.
but could be worked out in a truck ez-pz with back set on rims.
FYI.you could use a stock width truck axle with a 10" rim with 7.5 backset to tuck a 29x15x15 M/T in the fenders with some tubb work..looks like stock rim but has lots of tire in the fenders.
this is why i look for the 94 jeep 8 1/4 axles and looking for 1 with disc brakes next project i do.
I take it you want to tubb it for fattys with the A-body 8 3/4 correct? that will use a 12 wide 4.5 backset rim
Honestly, I'm not sure what I want after reading some of this stuff. I'd like to run 8'-10" rear wheels. I have a mid to late 60s 8 3/4 and can relocate the spring perches easily enough.
My truck is a stepside and I have a few off the wall ideas I'm chasing around right now concerning the bed. I don't want to open a can of worms.
Posted By: scratchnfotraction
Re: rear end swap question - 07/09/14 03:26 AM
I know just what yer sayin.
wish you was a little closer, I have a real nice 88 wide box I would trade for the stepside.
how wide is you 8 3/4 housing flange to flange with out the backing plates?
you may have what you need already, flop it in there and measure up the right backset on rims and a 10" rim is no trouble..may not need to tub the bed.
the 67 polara/c-body 8 3/4 I have is 55" -/+ my stock truck 8 3/4 is 59" same as a 73 c-body.
check your housing measurement and post it up.
seems I ran a 10" rim with 3 3/4" backset with a 32x11.50x15 mud tire and it just did fit the stock stepside tubs/fenders.
so 10s should be ez to fit in there.
wish you was a little closer, I have a real nice 88 wide box I would trade for the stepside.
how wide is you 8 3/4 housing flange to flange with out the backing plates?
you may have what you need already, flop it in there and measure up the right backset on rims and a 10" rim is no trouble..may not need to tub the bed.
the 67 polara/c-body 8 3/4 I have is 55" -/+ my stock truck 8 3/4 is 59" same as a 73 c-body.
check your housing measurement and post it up.
seems I ran a 10" rim with 3 3/4" backset with a 32x11.50x15 mud tire and it just did fit the stock stepside tubs/fenders.
so 10s should be ez to fit in there.
Posted By: wedgeheaded
Re: rear end swap question - 07/09/14 12:56 PM
Here's the rub. I was saving the rear end I have for my 75 Cordoba. It has an 8 1/4 and this mid 60s B is 3" narrower. I have 295/50s on the Doba and they rub in just the right situations. Lately I'm thinking I want to switch to 275/60s on it and use my spare rear end. I guess I could always snag another mid 60s 8 3/4. Right now I'm just chasing rabbits anyway. I need a nice PS door, everything else is pretty decent. I've just been thinking about ball joints, bushings, and such. That would be the time to lower it and it would be best to have my ducks in a line.
Posted By: wedgeheaded
Re: rear end swap question - 07/09/14 05:35 PM
Hey Scratch, here ya go, (we were talking Cordobas in a PM but I can't send him a pic via PM, so here it is)
.jpg "8203060-mopp_1103_06_+ten_best_cheap_mopars+_chrysler_cordoba(2).jpg")
Posted By: scratchnfotraction
Re: rear end swap question - 07/09/14 10:09 PM
my 76 daytona charger was just like it. yes yes I liky!