Hot seat's big bores tend to be really peaky and tough to clutch and tune/worthless in the mtns. Go with a Carls kit if you want to ride it and not tune it all day. for the ditch banging and lake running make sure when you talk to Carls to tell them what and where you plan to run it. They will hook you up right. I would say somewhere about the 180hp mark would be about right for that motor.
Remember that HS is dyno'ing their motors @ about 1200ft in MN so there's a big difference from that to the about 6000' that Carls is located at. A "peaky" motor can make some impressive numbers on a dyno when you can make conditions perfect, but it's hard to make run perfectly day in and day out. (see PSI)
One other thing that I have learned is that Pipes are best designed for the elevation that they are to be used in, just another consideration. Along with that I have found that with elevation you can get by with a little more "aggressiveness" in setup, porting, and pipes. At low elevation mild porting, big displacement, and SINGLE PIPE is a good rule of thumb for big useable HP.
Just my .02
