I just wanted to update this thread to the final result. We ended up not changing wheel bearings because there is no direct conversion and I found others have had issues with outer taper bearings burning up after the conversion so we left it alone. The rotors are 2003 HD along with the calipers. At this link is a complete list of whats needed to do this conversion along with part numbers.
http://www.thehollisterroadcompany.c...converion.html
For the booster we used a 7" dual with a bracket that allowed us to keep the stock pedals. Master was a 1.125" corvette type and a remote reservoir kit so the fill is on the firewall. This truck stops with very little pedal effort and may give you the impression of a low pedal when you set this up prior to driving it but it reaches 1200 PSI line pressure using the stock foot pedal which is enough to do the job. here is a picture of what it looks like wheels on. It can use 16' wheels but these are stock 17" converted to tubeless.