Oh lord, you are killing me Rick, I made less power on a load dyno than on a inertia dyno. If you wanted to load it you should have dynoed in O/D. Your problem is that you don't have enough fuel for twins and the set you have on your truck aren't ment for Big HP numbers. The kid over in Fresno only did one other truck, (Joe Donnely's Old Sickley) and mine. All you have to do is push the button when you want the dyno to come on. If lots of other trucks can make power with no load than yours should too. Your problem is that you can't get the air in before 3000 rpm and you can't get the exhaust out with a hx 35. M. Kendrick had loads of fuel probably double yours, and had a hy-9 and a ht3b, and couldn't get over 400 HP. You are too restricted, on the hx 35 compressor housing and hx 35 exhaust housing. If you want to make the most out of your set-up, put some 370's in and pull the plate out.