busted kohler engine

I have a troy-bilt bronco riding lawnmower model # 13wx78ks011 with blown kohler sv600-0224 engine would like to replace it with a B&S 3319770001 engine. Will this work are just wishful thinking on my part?, heard I would have problem with exhaust outlet and wiring I am 73 years old on SS yard is too big for push mower. Would be great full for any help.