So today I went around and found a machine shop that would check the bore measurements and bore it to 30 over on my 305 engine. I also asked if they port and polish heads also. He said that they always have work coming in and stay busy and that they don't do it because it is to time consuming for them to be able to and he also told me that there is no one in the Savannah, Ga. area for performance upgrades. I looked around on the internet and the phone book and he is right, there is no one in this area that will do it. I've seen them being done on the internet and it doesn't look to be that difficult. Is it possible to port and polish at home or are there to many special tools and machinery needed?