Rearend width

[red cuda]

Is there a width difference in early a body swaps? I have got to swap out the 7 1/4.

 

[1970Duster]

No. But the 7.25 came in the widths. Sbp is smaller than the bbp.

 

[red cuda]

That's what I need to go to, maybe the 8 1/4 BBP.......I need to how much , so I can figure my wheels, and backspace

 

[red cuda]

does anyone know the width?

 

[1970Duster]

Exactly how wide it is I do not know. But it is a direct bolt in job. Now if you have an a body 8.25 rear go to the junk yard and find a 96 or olde jeep GC and pull the gears and sure grip unit as well as the rear disc brake setup. Then bolt it all to the a body 8.25 rear. Boom now you have an 8.25 a body rear with a descent set of gears (say 3.55) with a suregrip and rear disc brake for very little cash!

Oh yeah you'll need a shorter length driveshaft.

 

[Inertia]

http://www.moparts.org/Tech/Archive/axle/16.html


I prefer this one,, knowing the actual axle length is incorrect for a-body..

http://www.mymopar.com/index.php?pid=73

hope it helps

 

[ProStocker273]

8-1/4 is .75" narrower overall length than 7-1/4 sbp.

 

[H20loo]

I kind of remember a difference in width between the 71/4 diffs with9 and 10 in drums. Didn't the 10 inch drum face sit out 2 1/2" from the flange the same as the 8 3/4 diff . And the 9" were 2" out.
The numbers I have written down are 56.5 (drum face to face) for the A body 8 3/4 and 58 1/8 for the sbc 7 1/4.
the late Duster 7 1/4 was narrower.