I would send it off to Kevin at Herr Jugs Racing and have him do your porting. I have a couple engines that he did the port work on and all of them are amazing. If your crank you have now is in good shape I would get a stock-stroke port job. If your crank is due to be replaced you might as well get one of kevin's 4mil cranks and have him do a 4mil port job for you. He has some of the fastest turnaround time and does very high quality work. Go to Kevin and you won't have to worry about anyone else having to "fix" your cylinders.