You can either stroke the crank and gain displacement, or run a longer rod, which keeps your displacement the same (you can do both too). Adding stroke is accomplished by moving the pin on the crankshaft out further. The longer rod gives it less of an angle, which should make it more reliable. For either one you have to do something to account for the fact the piston is further up in the cylinder, although Im not sure what all you do with what setups. I know they use blaster pistons, as they have a smaller pin to crown length than a banshee piston, and they use spacer plates for some setups too.