Best Cylinder Head Porting Shop/Vendor- Your Experiences w/Results

Dwayne Porter, Porter Racing Heads. Vermont
X head
Stock flow unknown
Stock hp unknown
After porting flow 278-284 really depends on which port.
I picked up 3-4 tenths changing from unported eddy rpm heads and an air gap to the ported x heads and a stock 68-69 340 intake with the divided cut down. Recommend him highly!