Slant Six Forum :: Bolt Circle for 8 3/4 Rearend?

Quote:

I just brought home a '72 Duster and it looks like it has 5 on 4" center wheels. I am going to replace the 7 1/4" rearend with an 8 3/4" and rebuild the front end with disc brakes. What pattern rear end do I need to have matching wheels front and rear?

That depends on which disc brakes you install ('65-'72 4-piston items have 4" bolt circle; '73-up single-piston types have 4Â½"), and upon whether you get an A-body 8Â¾" or obtain and modify a B-body unit. The A-body 8Â¾" rears have 4" bolt circle; B-bodies have 4Â½".

Author:	bwhitejr [ Mon Apr 17, 2006 4:41 pm ]
Post subject:	Bolt Circle for 8 3/4 Rearend?
I just brought home a '72 Duster and it looks like it has 5 on 4" center wheels. I am going to replace the 7 1/4" rearend with an 8 3/4" and rebuild the front end with disc brakes. What pattern rear end do I need to have matching wheels front and rear? bwhitejr

Author:	Lars [ Mon Apr 17, 2006 4:56 pm ]
Post subject:
5X4 1/2 Is what is normally run.

Author:	SlantSixDan [ Mon Apr 17, 2006 5:21 pm ]
Post subject:	Re: Bolt Circle for 8 3/4 Rearend?
Quote: I just brought home a '72 Duster and it looks like it has 5 on 4" center wheels. I am going to replace the 7 1/4" rearend with an 8 3/4" and rebuild the front end with disc brakes. What pattern rear end do I need to have matching wheels front and rear? That depends on which disc brakes you install ('65-'72 4-piston items have 4" bolt circle; '73-up single-piston types have 4½"), and upon whether you get an A-body 8¾" or obtain and modify a B-body unit. The A-body 8¾" rears have 4" bolt circle; B-bodies have 4½".

Author:	Lars [ Mon Apr 17, 2006 5:44 pm ]
Post subject:	Re: Bolt Circle for 8 3/4 Rearend?
Quote: Quote: I just brought home a '72 Duster and it looks like it has 5 on 4" center wheels. I am going to replace the 7 1/4" rearend with an 8 3/4" and rebuild the front end with disc brakes. What pattern rear end do I need to have matching wheels front and rear? That depends on which disc brakes you install ('65-'72 4-piston items have 4" bolt circle; '73-up single-piston types have 4Â½"), and upon whether you get an A-body 8Â¾" or obtain and modify a B-body unit. The A-body 8Â¾" rears have 4" bolt circle; B-bodies have 4Â½". /slaps head. I forgot about the A body 8 3/4. Measure the studs to see what you have.

Author:	dakight [ Mon Apr 17, 2006 6:54 pm ]
Post subject:
My understanding is that all a-body 8 3/4 rear ends have the 4" bolt circle. To get the 4 1/2 you will have to get your axles redrilled or get some custom axles.

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