Hey FuJi,
I have talked to Micah aka homemadewrx on here about building an NA eg33 with either 99.5 pistons or a 4" bore if we can do it with the 75mm crank and 4mm+ rods. Now the question here is if the 4" bore is possible, the intake ports are big already on the eg33 head from what I just read, then what do you think would need ported to allow really no low end loss but nice gains in the mid and upper rpms like up to 8500 rpms or so?
Looking forward to your porting pictures of an eg33 head