Does anyone know if it will work. I bought the grizzly for the plastics and wheels. Only the front wheels will work because the back are dished way in for the IRS. Anyway, I got to thinking about putting the Kodiak 400 engine in the grizzly 450 frame because of the IRS and it a very good looking 4 wheeler. I think the engines are the same size and think the mounts are the same but don't know if the driveshafts will work on the back because of the IRS on one and solid axle on other. But, I have all the driveshafts off of both. Any one ever heard of anyone doing this, please let me know.