J head max compression

moper said
98 octane in Europe and AU is the equivolent of 93 in the states. IMO - you'll need to be very careful with the cam choice - and it may still have problems. Plus - cuttting a J head to 62ccs is leaving them thin at the gasket surface...

moper said
That's a lot of milling...

Thanks for posting Dave. I didn't even consider the fuel differences between countries.