I'm not big on the Whiplash cams. If you go with a KB flat-top (valve reiefs and close-to if not zero deck), you can stand some camshaft. Some of the Street Force Howards cams look good, the 265DEH Comp Dual Energy is a possibility and the old Cam Dynamics Energizer (available white box generic for cheap) 272/.454"/110* is a default for this kind of build. The 272 sounds great in a 318 and is snappy. Open the Performer intake to slightly under 360 size (it comes 318) and gasket match the 318 heads to the 360 gasket. Put 360 valves in and bowl-hog (70* cut)/blend the cuts to the runners, use drop in 901 Comp springs or even NEW 340 red replacements. You can use the Mr.Gasket .028" head gaskets if you end up negative a bit on deck clearance. I use a 625 Street Demon with the TQ-like plastic bowl on my hyped-up .060" over 318 (270s Comp cam), and it works flawlessly out of the box. I use a Flowmaster 2.5+2.5>3" merge collector and use one 3" muffler behing 318s for torque production and packaging. Plenty of flow!
