STOP for a second.
I just went through this mess my self and ran into a few problems. I am porting the heads myself and it really isnt too bad, but takes some major [censored] time. I have about 30 hrs of work into both heads and will prob have about 40 hours total. I am doing the intake, exhaust, valve though and am using a craftsman drill with a shabby craftsman bit .
300 bucks is damn cheap if you ask me. I payed 110 just for the welding and they even [censored] that up some. The welding should be done AFTER the porting has already been cut, but not detailed or finished (unless you have done these heads before and know how to build the spots). I did the welding in the beggining only to have to go back and have them weld more, which is why it cost me 100 instead of just 50. More welding is need than just to close up the old injector ports BTW. You need to build a "shelf" on the top part of the port and build one on the bottom. Positition the intake gasket over the port and you should see that it "dips" in the middle which is why the shelves need to be built.
Did that 300 include welding? If so go with that and see if he will include the exhaust opened up a bit. Make sure this guy can do the work though. THis is an extremely artistic job and a little more than your normal head porting job. Remember art is either REALLY good or REALLY bad. There is no in between.
Post some pics of what you have so far it may help.
