I think I would have gone the plan B route if I didn't already take the original wheels to a shop to have the flat spots trued up. Keeping everything as original on the truck as I can with exception of the front brakes and master cylinder...Going to go with radial ply look-a-likes with tubes...
Today I got the air grinder out and quickly took some of the caliper corner back. I then took the other wheel's spacer off, and doubled it on the one I'm testing, and it looks like I'll be good.
So in short, if I use 1/2" worth of spacing on each wheel, along with some reduction on the proud corners of the calipers, it looks like I should end up with enough stud thread to work with. Off to NAPA tomorrow....thanks