This is a just suppose..... Let's say I've got a lowered Craftsmen, 12 hp, I'm running a 4.25" pulley on the crank, I'm running a 4.25" on the lower jackshaft pulley, presently I've got a 5.25" on the top of the jackshaft, and a 4.5" on the Foote trans. I've got 18" tires and the only mod was to lock the rear end and the gears are in an oil bath vs grease. If I change the upper jackshaft pulley to a 7.5", would that be the same as changing the crank pulley to 7.5" Also, what might be a good ratio to work towards for good torque out of the turns,(remember I'm running a "Road Course" type event) MOWERCROSS!!!