360 heads on a 318. good idea?

IMO, I'd look for a LD4B or a Performer intake, both from Edelbrock. Even a stock iron intake is OK.

Claude, you think the RPM has large ports, check out a LD340 or Strip Dom. from holley, or a Mopar single M-1. Darn near gasket sized allready. Bigger than the RPM's ports.