laern how to read your plugs. start with a 75 shot run a pass as soon as your done turn your car off take your plugs out and examine them. this can tell you lots of things, to lean,detonating, etc. then if everything is good pull a degree or how ever many, step up the shot to a 100 run another pass and repeat.
as for the stand alone fuel system i agreee way over kill for a 150 shot just make sure your pump can keep up.