318 cam

I would personally take second look at Summit, specifically the 6900/6901 cams.

A .480 lift is pretty big for an otherwise stock, low compression 318.

Those two I mentioned above have been proven to "wake up" a 318 without going overboard and also without requiring lots of other performance parts.

Of the two, the "split pattern" should work better with stock exhaust manifolds, and the "single pattern" should work better with headers.

I'd also look a the Comp "256" XE and/or the Lunati equivalent.