Yes, MAP does lots of port work
http://mitsustyle.com/forums/showthr...haust+manifold
I would just go with a basic set of cams, there are lots out there and yes you can always go further and further and further 'while you're in there' but ultimately the name of the game is KISS and keep maintenance/tuning a priority over more more more parts.
Yes, the GSC S1 is a decent cam, pretty sure I said that a few times now
If you can't find a good used set of cams you like and feel like getting a more aggressive setup, go for the kelford 272's. Lots of people running them on the stock valvetrain w/o issue, just keep the stock rev limit in place.