Thanks Grigg,
The ultimate goal is daily driver with good brakes and tire available from more than one source. I'm buying the whole bus so I will have the p30 front axle to shorten and swap in. All wheels and tires are included so I'll have 8r19.5 ten lug rims that I know will clear brakes.

I don't know ratio yet but they tell me it runs 65 no proble with a 5.7 v8

I've read all your post on the axles and brakes and the only negative I heard on the Rockwell was the gear selection availability.
I look forward to reading more
Thanks
Chuck