Ok, so here's my 2 cents...I bought a brand new Willies 17X54 last year and also purchased a brand new Yamaha T-8 long shaft(high thrust) which weighs in at 108lbs by itself. My thinking was when I get a jet sled I could swap kickers. With the extra weight on the transom and the thrust of the prop it really kicks the nose up to a point that if I open the throttle up I couldn't see over the bow well enough to make navigating the river anything but a comfortable endeavor. A little scary

Ended up purchasing a hyrdo foil which really helps in still water like lakes and calm eddies, however, it still can get a little sketchy trying to go up stream with any sort of confidence. Without a keel these drift boats are not the best handling in oncoming currents.
So an Alaskan guide friend pretty much convinced me that a drift boat is just that, intended to drift and be oared. I have since removed the motor and it's associated accessories and found that if you are a good oarsman there is a lot more water that one can cover even going back up stream. It's a little work, but hey, nothing worth while is easy. I have found a new respect for Willie's drift boats due to their high ride in the water without the additional weight and have committed myself to rowing only in the drifter and holding off motoring on the water until I do get that jet sled.