I have ran the 2087 pipe and 204 header with the B11, the F11, and the C6USA. The 2087 pipe is actually a shorter pipe than the 2045. It is a lot of bottom end and way to much for buggy but I am also racing at 6,000 feet elevation so the power you would feel would be considerably more. I never tried the plain C6 with a 2087 but at your elevation I bet it would be just fine with a 192/2087 combo in truck.

I doubt I will make the Nitro Challenge this year. I was there for Nitro Challenge 10 a few years back. (The year before the 12 pack) Work has been crazy for me lately so getting that much time off probably isn't gona fly.

I am not sure how that hybrid motor is gona work for ya.. While the WS7 is a 7 port with many of the same port configurations they share a different bore and stroke. The C6 crank pin placement is most likely what changes the stroke as they do share the same rod. Also with the different bore I am not sure the sleeve will fit in the case unless you have already tried it. If it does all fit the C6 crank may push the piston too far up in the WS7 sleeve.