I have a GT 3000 garden tractor with a blown 22 hp Kohler Pro motor. I have the opportunity to get a 18hp Briggs that runs great with minimual usage for $200. Will the motor bolt right up or would it be easier to go back with a CV22 Kohler Command ($300) that I found. Did some GT 3000's come with a Briggs and is an 18 hp too small to put in when it originally had a 22 hp? Any help would be greatly appreciated.