Budget cylinder heads for a 318

I agree ... for a 318 use the old 302 castings 1.88 valves or so and some good pocket porting/bowl blending pretty hard to beat. Now when the magnum heads came out they are a out of the box performance head for a 318 and probably the best out of the box 318 head. And without a doubt the best performing factory 318's the factory ever put out. I'm not so sure that the 360 magnum is the best performing factory 360. But that's a different topic

Almost all small block mopar parts available are centered around a 340/360