Carb Intake Combo, Whats Needed?

I guess that depends a little bit on whether or not you plan to transfer the manifold and carb to the 360. If so, I would lean towards a performer RPM. If not then the regular Performer or factory iron. The RPM has bigger ports and runners so it will breather better at high RPM, but there will be a port mismach on a 318. A regular Performer will be restrictive on a healthy 360.

If you are running a stock 318 with factory single exhaust, you won't notice the difference between them, as the exhaust is your biggest restriction.