Making power out of the 318

66fs said
My brothers broke into the 12's with his, but of course, we never had anything that was stock. All you had to do is ditch that Ford Autolite 4 barrel and get a decent intake and you were at 300+hp. We also ran 351 Windsor heads with Chevy 1.94 and 1.60 stainless valves.

You have to run the 69 351 heads. Later ones used the toilet 302 emissions heads with the smaller valves and larger combustion chambers. Using the 351 heads requires either spacer washers for the 7/16" head bolts or drill and tap the block for 1/2" bolts.