I don't see why there should be ANY discussion about a gearcase with BASS? Well let me change that to... They SHOULD be consulted for "nice and proper etiquette" but as for them saying "NO" if they did that then they are going AGAINST their OWN WRITTEN RULES and would then be blatantly discriminating against Grant, Allison & Yamaha!!! Their rulebook says NOTHING about bolt-on parts that don't effect the engines horsepower output! In terms of "power modifications", bolting on a different gearcase is no different than changing props!
This is copied directly from the (Bassmaster.com) 2014 BassMasters Elite Rule Book:
C8. HORSEPOWER REGULATIONS:
MAXIMUM HORSEPOWER FOR ALL OUTBOARD MOTORBOATS USED IN OFFICIAL TOURNAMENT PRACTICE AND IN TOURNAMENT COMPETITION WILL BE 250 HP.
Horsepower cannot exceed the limitations set by the U.S. Coast Guard. When required, each boat must have a U.S. Coast Guard horsepower
rating plate attached to the boat by the manufacturer. The horsepower of the outboard engine must NOT exceed the rating specified on this plate nor the horsepower maximum set by B.A.S.S. Each competitor agrees to submit, by his signature on the official entry form, the boat and outboard motor used in the tournament to an inspection by factory-trained personnel if there is any reason to suspect the horsepower is in excess of the rating. Normal maintenance of engines is allowed. Changing or altering standard factory parts of a competitor’s engine to increase the horsepower over the factory horsepower rating is forbidden and will result in disqualification. Falsifying information on entry forms or altering the horsepower-rating numbers on the engine is also cause for immediate disqualification from B.A.S.S. tournaments. Posted speed limits and those imposed by B.A.S.S. must be observed, and all boats must be operated in a safe manner. Violations of speed limits shall result in loss of competition hours and not limited to disqualification.
I say either Yamaha wants THEIR case on there so they allow Waynes mods on a stock SHO case or Grant has Wayne use one of his adapters on it to bolt a SportMaster on it and then it's nothing but... STAND ON IT SON!!! :beer: