I currently am running a 100 shot off my zex kit and I am ready for more. I already have the colder plugs and the Bama Chips tune but heard I can safely go to 150 on stock internals. Who is running the 150 and what kind of results are you getting? Also, what other changes did you have to make for this increase in shot size? I heard just a fuel pump upgrade. The options I found are a GT500 double-pump system ($700) or a Kenne Bell Boost-a-pump ($250) or GT 40 SUPERCAR Fuel Pump UPGRADE (set of 2) ($199). What pumps are you guys running and is this all I need to add?