I bought a set of factory brakes off a 2003 Chevrolet Corvette (C5) Same brakes you find on a Z06 just not red. I was going to put them on my 76, but my project has fallen into the "might as well" stage, so Im going to go even larger with some 6piston wilwoods. The brakes have 7500 miles on them. These calipers include the abutment brackets. So you dont have to go searching!
Calipers w/abutment brackets and lines-250 + shipping SOLD SOLD SOLD