what about using a piece of alum pipe for that instead of the PVC?
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cobra/bullitt/mach calipers have the same size pistons
heres a set of new bullitt calipers w/pads Buy Ford Racing Parts - Special Edition Bullitt Mustang Front Calipers
i bought a set of MSD cut to fit plug wires a few years back that came with a crimping tool, it was pretty simple to use and worked great. Im not sure if they still sell kits with the tool in it or not though