Sorry it's been a few since my last post.
What I was refering to with the 6 lug... 8 lug rotors, etc... Is specific to van components. Which is what I'm working with. the 03-05 2500 vans have 2 different axle options. Both are semi-float axles. The 8 lug actually being a Dana 60. The both use the same brake caliper bracketry. The only real difference is the 6 lug version has slightly smaller pistons. What I'm planning on doing is using the smaller caliper with the 8 lug rotors. Confusing? Yes. Since the 3600 is quite a bit lighter the the late model van and I can get away with a smaller master cylinder, is why I chose this option.
Anyway, centering the rotor. My plans are to use a couple lug nuts to center and hold the rotor to a hub. Then use the existing holes as a sort of pilot and drill the rotors for the tapered bolt. I know this will need to be repeated anytime the rotors are replaced. How often is that going to happen?
Anyway. Best of luck . Keep up the good work.
Chris