Just keep in mind a single ended ram will have more power on one side of the ram (extending). So a smaller dia. piston will help compensate (but is weaker). A double ended ram would solve the problem. Bigger bores require more flow, so higher flow pumps are required as well as coolers, and bigger reservoirs. All said, I run a 2" bore, 1" piston 7" stroke, GM pump, Toy box, ATF and have no problems.