I'm thinking the xb9 mod is one I'd like to go in for come the fall. It sounds like just what I'm looking for, a little more pull outta the gate.
if its not too lean you shouldnt be running too hot. how does it restart once its warmed up? like the motors tight? or does it crank over nice and easy? recheck fuel feed line from pump to fuel rail and make sure its not kinked or restricted in any way that could cause a lean condition. plenty of pressure may be available but not enough volume if that plastic hose is kinked or pinched. second, get a non contact digital thermometer, I got one for work, and use it on the boat motor, I can tell a lean condition by the temp of the exhaust pipe or cylinder, lean one is hotter! rich ones are cooler, seen em do it on drag cars for tuning as well. available online, got a little laser pointer on em to indicate where temp is being taken precisely. and dogs and cats love chasin the laser. other than that, keep ridin it to help it loosen up. lemme know how it goes, keep it up!