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Old 03-28-2011, 06:43 AM   #1
tazattitude
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Join Date: Oct 2010
Location: Largo, FL
Posts: 532
Pics and input on the Boss 338 wheels!!!

Anyone have pics of a 60-66 with the Boss 338 wheels?
I did a search, and the only one I came up with is justbad's truck (nice by the way).
Found some pics and useful info in the 67-72 forum, but their setup is a little different.

Here are my susp mods
front is disc with 13" rotors (CPP Big Brake), with the 1.25" rotors
Rear is stock 66 C10 12 bolt with disc brakes/12" rotors.
Seems to measure 62 1/2 wide from where the wheel mounts.
My SBF width seems to be 75" wide from inner lip to inner lip.
So I come up with 12.5 total wheel mounting point to fender edge.
Divide that in half and I have 6.25 on each side from mounting point to lip edge

The Boss 338 20x10 has a 6.25 bs which leaves 3.75 up front.
+ I figure about an inch for the tire sidewall. So that adds up to 4.75

If what I figured works out, then I would have a gap of 1.5" between the sidewall and the fender lip. + You also almost have to factor in the actual FAT lip of the Fleetsides. Almost 3" or so from the outer lip to the sidewall. Probably too much, so I was thinking of running 1" spacers.
Inside is no problem as I'll be running some widened stock tubs.

A couple of things that concern me is the 'spindle' problem where the wheel will not fit the 1.25 rotor/spindle without modifying. Looks like Boss might have that corrected according to their blog. They only seem to fit the light duty 1" thick rotors
Also, the backspacing, ONLY one choice for the 20x10 (6.25) for the rear wheel. Wish they had a 5.5 (like the Foose Legend).
I plan on going 18x8 up front and 20x10's in the rear.

Sooooooo... looking for any pics of them on a 60-66.
Along with what you did to make them work.
Thanks
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