Tried it again, clutches as close to aligned as I can get them. Conditions were a little powdery, but once again 90 all I could get. My buds fz 583 would stay w/ me for 20-30 yards, then I would pull strong to 70 mph, and not pull on him any more. My bros ultra 680w/slp pipes would stay side by side, and he pulls on me after 90. My 97 mach 1 would not pull on them untill about 60, but then it was by by to both, right up to 110. I cant figure it. All stock 98 except for dyno can and 192 pics, same as my 97. I put a 230-380 primary, rest is stock, 286, solid pins straight 50, clikers on #3. Any ideas? What about 52-44 helix, like a 97 mach. I was thinking about pipes, but with proper clutching, I should be able to run w/any sled in 660.