are you getting the 70cc piston port puch kit? that's what i got and i'm damn near opening mine up.
things i'm planning to do:
boost port holes in the piston, make the four into two and lower.
transfers, they can easily be opened up a bit. look at the part of the cylinder that goes up against the case.
i'm gonna mess with my exhaust port a bit, maybe raise it a little and widen it. it's best to mess around with base gaskets before raising the exhaust port.
thinking of chopping off a little bit of piston skirt on the intake side.
also a single ring treatkit seems like a great place for some bigblock fiearo tech....ring ports and transfer eyebrows.
i'm saving up for a new dremel.