Anyone have thoughts on putting tractor tires on a front tine 6.5 HP Craftsman tiller to use as a walking tractor. Would the pulley size ratio need to be modified? I need something to till weeds in the middles then throw dirt to the row to hill up corn, beans, etc. Might not need the tires at all, the tiller might work fine. But, with the tires I could use for other things such as making seed furrows.