I don't know if anything was done to the port heights when I just had it bored to 67.5. All I know is he bored it, provided a Wossner piston, chamfered the ports and milled the head flat. I started it up on Sunday and rode it around and so far it runs good. I bumped the pilot from 45 to 48 and main from 155 to 160 and it's a bit rich but once the rings have some more run time I'll mess with leaning it out if needed. I did a leak down and found and fixed a few leaks before installing into the frame.