6M uses all the same gaskets and seals, with the exception of the crank oil seals. The pully on the 6m has the larger inner diameter of the 7M crank. A 5M pulley can be machined to work. Ecu diff's are not a prob, juss need to richen up the AFM in most cases. The 6M ecu comes around here and there....but you honestly don't need it. Let me know if you want a 6M.