As I continue to work on restoring a 1974 AMF lawn tractor, I am thinking I am going to replace the engine with a new one. The existing engine is an 8 hp briggs and stratton, I would like to replace with a 17.5 hp briggs and stratton. I've never done this before, any problems with replacing with a higher hp engine? I already think I am going to have to make an adapter plate because the four holes to mount the motor to the body of the tractor are not the same. Also, the existing engine had wiring going to a solenoid and to the starter switch, but I believe this new motor will have a solenoid already installed? Just not sure how to wire the new motor compared to how the old one was wired. Any suggestions appreciated. This is the motor I want to replace with: http://www.ebay.com/itm/Briggs-Stratton-Engine-31R907-0007-G1-17-5-hp-Intek-repl-31C707-3026-/321353996908