I have a silver craftsman 10hp 30 in cut that the engine threw a rod through the side of the block and the previous owner gave to me. The mower is in like new condition and include a bagger system. My son wants me to put one of the 18hp twin B&S that are setting in the garage on it. The engine will just fit in the rear housing, but I will have to fabricate a custom exhaust around the the bagger. I am considering the idea but am a little leary about the speed and power associated with the 8 additional hp. What does everyone think? Are we crazy or not?