Mach 427 ?
#2
I got this one from ebay for my Mach. Im sure you can find it other places too if you want.
http://cgi.ebay.com/Dynamite-P-S-Eli...3286.m20.l1116
http://cgi.ebay.com/Dynamite-P-S-Eli...3286.m20.l1116
#6
iv converted 5 or six of sptwks&427's to bumpstart and had to dremel the inside of a couple of these(backplate). some are a little thicker and need to be ground to make clearance.