In summary:
you should always ask God for help "before" beginning a project!
You dont know until you try.
The brothers kit fit nicely with just a little bit of grinding on the caliper...
Harvey from classic performance parts helped me detirmine the the kits were the same dimension (his and the brothers kit)
that's a good person--someone who will help you even if it means losing a sale.
thanks for all your advice...
one day soon the 48 will be on the road again with disc brakes!
Jimmy