Either way I have heads thatll work if the 302’s end up having more than slight issues that are easy to fix like between the valves where the quench pad drift slightly into the bore it the only spot I think I may possible make contact. If I could find the smaller valve heads I’d use 0 deck flat top 167’s because they flow way better than 302’s in 318s because of the small bore, in a larger bore motor they flow great but the valves get so shrouded in the 318s bore and even for smaller valve heads on 283’s you have to notch the cylinder walls. I’m not on here much and it’s being made for an aspen r/t im building for my mother in law, she had a 4 speed one it was her first brand new car and she wants another; her since passed away husband left his old b200 van and it had no miles, but the body rusted so bad it looked like it was on airbags because the body collapsed around the wheels. Anyway, it was his last vehicle so I’m building that engine to put into a car of hers which is why I’m so set on it being a 318. Also I love the 318 they’re super great motors and can do anything a 340 can; anything a ford 302 can, more than a Chevy 305 ever could haha. And could do Al isn’t anything a 351W and a 350sbc can it’s just tough to get a hold of the parts