I have an '87 sunspot with an f351 which is running smoothly but I'm not reaching the speed or rpms I should be getting at WOT (3100 rpm, 35-36 mph). I'm not familiar with working on carburetors, but is there an adjustment that I can make to increase my top end speed? Am I right in thinking I should be getting another 1000 rpm and around 42ish mph? Also I'm not sure what prop, I have on there. I'll have to look next weekend. Is there something I should be looking at other than the carb and prop? Any suggestions would be helpful.