ARP Head Stud Question

if your heads have 1/2" inch holes those are the ones you want. most aftermarket heads have 1/2" holes.

I have a set of Systemax heads and that is the head stud set that I got.

A stock 302 is drilled and tapped for 7/16" studs or bolts. A 351 is drilled and tapped for 1/2" studs or bolts. Lots of aftermarket heads are drilled for the 1/2" diameter 351 bolts or studs not the 7/16" ones that are in the 302.

The ARP kit that you have should have some stepped washers. The washers reduce the 1/2" hole in the heads to the 7/16" diameter of the studs. That 1/16" doesn't sound like a lot but it is. What you would have to do to reuse the headstuds that you have is get a set of the 7/16"-1/2" stepped washers. The set that you have should have the stepped washers included. I looked them up on Summit and they are ARP part # 200-8598. And they are about $41 for a set of 10 stepped washers.