'93 chev factory aluminum wheels on '72 K5
 

anyone with experience installing 1993 chevrolet 4x4 factory aluminum 16" wheels on 1972 K5 blazer (front disc, of course). i had the centers machined out using original 15'' factory steel wheel as pattern, plus machined out extra 1/64".
rear wheel installed with no problem but something(probably original '72 caliper) is keeping fronts from fitting.
does anyone know if there is a slimmer/thinner caliper that will work?