340 cam for 318

I'd pick something like a Comp 250 or 256 over a slow ramp 340 ish cam, similar @ 0.050" and lifts, but quicker ramps with less advertised duration on 110. Or similar from other companies.
Slam em' open and slam em' closed. The old cams made power with low lift and easy duration. The new cams have faster lobes and are more efficient by opening the valve further, sooner. You know how they work. There is a limit though. Now, let's go roller cam. More expensive but better all around.