that is gonna be heavy!!!!!
the old flat deck 377 (1980 38' not sure if its the same as a KV) weighed in at about 9800lbs dry. SO they are heavy plu the old bottoms are slow.
It would however ride like a cadillac. If you did it right might be a very nice boat. Why woudl you want to bravos in it? Big power plus big heavy boat is goign to break bravos. Se if you can find some SSM3 drives. It is already set up for engiens with trannies. And SSM3 non crescent drievs ar epretty cheap now. You could most liely reuse the existing tranies and such.