Anyone using American racing torq thrust on 8-3/4?
Are a great way to destroy your shock mounts. They don't belong on anything. Do it right or don't bother.
how much wider is your b rear than the a was, b rears came in 2 different widths.
Actually, B-body rears came in
6 different widths. Although, before '65 they had tapered axles, so it probably isn't one of those. That still leaves 4 different widths.
Rear end widths, drum-to-drum:
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"
A BODY
'66-'72= 57 1/8"
More than likely though it's either a 65-67 or a 68-70 B rear. If you've got a 68-70 B rear in there, I'd say with a 235 on a 15x8 you'd want a
minimum of 5" of backspace, 5.25" would be better. You can go with more backspace than that too (probably up to about 6.25" of backspace), but the TTII's don't come with more than 5.25" of backspace in a 15x8. If it's a '65-67 than a 15x8 with a 5" backspace should be a piece of cake, and anything up to about 6" of backspace on a 15x8 would be fine.
I have a '68-70 B rear in my Duster. I run 18x10's with a 7" backspace and 295/35/18's, although I also added a 1/2" spring offset kit when I converted mine (perches at 42"c-c) and trimmed the outer quarter lip a little to squeeze the 295's into the stock wheelhouse.