Too big of cam?

One thing I do suggest, in your case, is DO NOT remove the head, unless you absolutley have to. The aluminum engine takes a special head gasket. These are getting hard to find, and are not cheap. Usually I would reccomend milling the head, for more compression, but not in your case. I would suggest looking around for a head gasket, or engine gasket set (make sure it is for the aluminum engine), so you have one on hand if/when you need it. I would highly suggest converting from the point ignition system to electronic.