Slantsix64
Well-Known Member
I milled 3 Pairs of small block heads that were never milled .045. intake bolted right on perfectly 3 times, you might of milled something that had already been messed with.
I wouldn't recommend milling the 67 heads... I put a set of 67 heads on a 72 318 with a .040" permatorque head gasket and the intake bolt centerline is too high and galls the intake bolts when I tried to install the intake... I have my intake at my head guy right now waiting to get milled for that set-up.... Once together, those heads and intake must stay together and not interchanged singly....
I don't get my heads milled to increase compression, I only have my head guy mill them to clean up the head to block face and make it true and square if it's off.....
Just bolting on the 67 273/318 heads with a .040" head gasket will lower the compression about 1 point...[/QUOTE]
I wouldn't recommend milling the 67 heads... I put a set of 67 heads on a 72 318 with a .040" permatorque head gasket and the intake bolt centerline is too high and galls the intake bolts when I tried to install the intake... I have my intake at my head guy right now waiting to get milled for that set-up.... Once together, those heads and intake must stay together and not interchanged singly....
I don't get my heads milled to increase compression, I only have my head guy mill them to clean up the head to block face and make it true and square if it's off.....
Just bolting on the 67 273/318 heads with a .040" head gasket will lower the compression about 1 point...[/QUOTE]
