I heard milling 50thoughsandths off my stock banshee head would improve and add hp.

Do you just have to shave it 50thousanths or do you have to shave it and mess around with dome squish??

Do you think a car racing shop where they rebuild motors can do this or do i have to send it to someone else who knows about it more?

this would be done on a banshee head

 

forgot to say i live at about 1000ft above sea level. can i still run 93 if i get his done