hi Motorman - I have ridden the sled hard this winter, both on trail and deep snow field riding and its working very good so far. According to the GPS speedometer on my phone it runs 70+mph on the top end and has lots of torque for the deep snow. The hydraulic brake sure works nice too, especially when doing some aggressive trail riding.
The engine install was fairly straight forward, but the hood modifications to widen out the spark plug bumps and back opening took a lot of work. Also, the stock headlight wont fit with the wider 540 engine, had to use a small LED instead.
Let me know if you have any questions.
Kevin