Seems like a lot of trouble to do that,(cutting/milling the top of the log),but if you want to do it,go for it.
I seen that Turbo Falcon run 11's on a standard log type integral 1 hole for the carb.
If you can force the air through that crappy flowing cylinder head & run good like that Falcon did & your friend only wants 6-8 psi,,,,,,,,,,,I really dont see the need to mill off the top of the log,but hey,do as your heart is content.
MBHD
