Please help with Tire offset

72bluNblu said
Good grief guys. It's right here... An accurate 8 3/4" rear axle width list

8 3/4" Rear end widths, drum-to-drum:

A-BODY

'66-'72= 57 1/8” (or 57 13/16” for BBP axles and brakes)

BBP 8.25/7.25= 56 3/4”

B-BODY

'62-'63= 58 1/2" (And '64 Max Wedge)

'64 = 60 7/8" (Exc.Max Wedge)

'65-'67= 59 1/2"

'68-'70= 60 1/8"

'71-'74= 63"

'71-'73 wagon= 64 3/8"

This comes up so often, the info above ^^^ should be a sticky at the top of this section.

When I converted my A-body 8-3/4 to shortened C-body axles, i carefully dropped a plumb bob to the garage floor and marked both sides. The bigger axles added exactly 3/8" to the track on both sides measured from the axle face, not the drum face. So I agree with your 57-13/16" dimension. The A-body drum face thickness may actually be thinner than the bigger drums too.

People always seem to want to stuff the biggest tires they can get away with. (I just bought a /6 70 Dart, what's the biggest tire I can fit?)
These little quarter inch increments here and there can add up. The old Direct Connection books said there can be a half inch difference from side-to-side on the same car.