1998 GTX limited

[maroco]

I am trying to get max performance out of my GTX limited. I replaced the engine and the carburetors and the fuel lines and added a fuel filter to the main fuel line. I also purchased a new battery and replaced the impeller. It is running pretty good but i feel like carb adjustments or other small changes could get it running perfect. Currently I can get it up to about 52 mph and i weigh 150 lbs. out of the hole i feel it does not have the power it could. I was thinking about making adjustments to the throttle on the carb and maybe adjusting the screws on the top of the carb but i am not sure what the best adjustments would be. Please let me know any suggestions on what to adjust and how to do it. thanks