Lee,
I just installed one on a 65 C-20 that I got from ABS. It fit just fine with the existing holes. The existing MC holes lined up and I removed 2 bolts on the firewall which also lined up. There has been a lot written about CPP, mostly they just push parts across the counter and if you have a problem they are not much help. That's a sad commentary when you pay that much for something.
Fred


1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine