I believe you're right. It seems like I can remember some kind of modification that you have to do to them, but I couldn't remember what it was.Unless they have changed the design of them you used to have to grind away some bolts in the engine just to get it to fit. So I personally don't like them.
ok I PMed him. So far I have jetted the carb with a K&N filter and a clutch kit for performance. Its doing alot better than stock but Im still needing just a bit more. Ive noticed reverse had to be lower geared than first gear because it will spin in anything easily. So thats why im thinking a gear reduction will help.