PE-95 Mill the head?

[plym49]

Hi, I've got a PE-95 genset with the GPW engine. The head gasket blew. While I have the head off to complete the repair, I was wondering if you can mill the head a bit to increase the compression.

I would not mind a slight increase in the CR. While I still want to run regular gas, I would hope that there would be a marginal improvement in fuel consumption.

Thanks.