Aluminum cylinder heads

I just wanted to be able to explore my options for when I freshen up the 318. Magnum heads require a expensive magnum only intake and the 302 heads are usually cracked, so I'm trying to find out what I can / should do, I'll probably wind up rebuilding the factory heads.

There is a RPM AirGap Knock off that works with LA and Magnum bolt pattern. Last I saw they were around $200. Most have had good success with it, some have had core shift but people have had that with Edelbrock stuff too.