[crackerjack]

you could polish the heads. if you know what you're doin, have a steady hand, and are patient then you'll have no problem doin it yourself. experienced guys can do it fast but they do it everyday, if you tackle it yourself you can do it just watch alot of vids on youtube, talk to some engine builders, and take it sssslllllloooooowwwwww and eeeeeaaaasssssyyyyyy. and remember you can always take more away but cant add it back