My drive is already 3" above the bottom of the boat and the new drive is a -4inch shorty. I dont think it will work for me but it does use #6 props and might work with a bigger diameter prop. The new scx is about to be released but we will have to see. Imco redesigned the lower in hopes of running speedmaster props and the lower unit being more efficient. I am tring to make up my mind if I want to keep the boat or go back to a cat.