Buy a adjustable push rod and check the length after you get all your parts in. I had a pair of Pro Comp heads and did not check the push rod length. After I wore out the valve guides I borrowed an adjustable push rod and checked the length. I was a 1/10" short. Sold the heads, bought KC heads and I am in the process of putting my motor back together. I was scared of the possibly that the Pro Comp heads had Chinese bolts and springs.
Dwight
The Keith Craft / Brodix heads are a work of art, I hate to cover them up.
See ya'll in London in June
P.S. I used the laminated aluminum header gaskets. Cost about $50 but they don't leak.