What cam should I use on 318?

For your level experience, I always suggest that you buy matched stuff. I like Edelbrock I would suggest the performer and cam or the RPM and cam, and 600 Edelbrock carb. Elc. Choke, good idle, vacuum, and dual plane with good torque and performance. The RPM might be a little large for your heads, but if you have 360 heads on it you can run them. Good luck.