Porting a slant six head

I'm going to be rebuilding a couple heads for a local guy to go to the 2 Mopars hes got with Slant 6's in them so, I'm following along, not the first time I've played, but....it has been awhile so, a refresher won't hurt any!

Im going to be dropping the head of today to get the valve seats cut in and am going to have hardened exhaust seats installed.
Then ill bring it home to start fooling around with the porting.

I have no intention of getting stupid with it, just a basic clean-up, whatever I can do to help flow without even coming close to hitting water is my goal.