Made some good progress on this. Got 8" wheels and mounted 16x7.5-8 tires (see my pre stretch idea to get bead to seat easier). Scratched my head a bit considering how to get this low, tires to clear fenders and keeping seat pan above tops of tires. I cut lower outer fender section off, flattened the step-down, then got it all to fit back together nicely... friggin' miracle. I'm happy with my solution. If I were more experienced with this I might have chosen a different donor frame.
Made front axle plates on friends ironworker. Verified my pre-set 10 degree caster and camber and tacked in place. Have 2 right hand spindles as that's what was in used parts bin and they are heavier duty than left side - 3/4" inner spindle shaft dia, and 5/8" outer so I'll have to mod. one dep if I go w/ front or rear steer set-up. Adj. camber w/ heim joints and caster - my plate is set at + 10 degree and the slot punched in to top of plate allows +9 to +15 degree range. Wedge adj. by arranging the washers above / below.
Need to start considering an engine. I don't have a sub 17hp single, or a + 8hp flathead per build rules... To keep going forward, deviating from build rules I do have a 17.5 ohv single, and an 18.5 ohv single. + I have a 12.5 f.h. opposed twin and a 16 f.h. opposed twin. I can also get a 20hp ohv v- twin.
If any of you weren't sure if you would definitely race this, which engine might you go with? Is there a brand new < 17hp ohv, vert. single I might find on a Black Friday or Cyber Monday sale? New would be nice, but I don't want to spend much...
Most images have description at album link:
https://imgur.com/a/DekcN2k