garch 22:

Dude you will have to cut the cowl I'm pretty sure. Mine is not here yet but when it gets here I will check it for you, I have a ST .75 it's not going on this bird but I can use it to check for you. I'm putting a Tiger Shark .91 on it. the Tiger came off my GP extra and it did not come close to fitting under the cowl and they are about the same size bird, the GP had a 65" WS and the super tiger would not fit inside the cowl. I never had it mounted on this bird but I can tell by looking it would not fit. Now if you mount it inverted you would only have to cut the bottom of the cowl for the head to clear but what about the muffler? it's got to come out some where to. Personally I would not try a .75 on the 66" extra anyway. Do you have a .75 supertiger just laying around or do you still have to buy a motor?

Miloh.