Regardless of cam or cubes, build it with some compression...They tolerate a lot on pump gas. You can go as much as 12:1 on most pump gas premium....They run so much better with some compression. That 10:1 stuff is for the other engine types...

Cams, to each their own. We have had very bad luck with flat tappet cams for the last couple of years. Nobody around here will build an engine with them anymore. Just remember the more cubes, the more duration and lift the engine will tolerate without sacrificing idle and drivability.