Good looking work! That's pretty similar to the way we adapted various disc systems to the round track cars, and it was pretty common to use rotors and calipers from different makes of vehicles. Here's a sneaky trick for anyone who is considering tackling such a project. Once the hub and rotor are married up and the hub is mounted onto the spindle, use air pressure to clamp the caliper and pad assembly to the rotor and tighten up the spindle nut enough to keep the hub from turning. It's a handy "third hand" while you're making up those templates for the caliper mounting bracket.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
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