On port matching - IMHO you make the sides maybe a little bigger than the head's port, the bottom smooth as you can, and open up the top of the manifold runner to create that reversion step. Go through and clean out all the boogers the best you can. Open up the exhaust opening to match your headpipe.
If you have another $600 - $900 to burn, the extrude hone process will make you feel like you've done something, but I bet there's not more than 5hp in it.
