When you say "jet it up", are you changing the primary and secondary jetting? I currently have 75 in the mains and 78 in the secondaries....how many jet sizes should I go up with the 100 shot and how much more timing and jetting if I put the 150 shot to it, the system is the NOS Powershot. Should I be pulling my timing with a timing light and locking the distributer where I see fit or should I buy a timing computer.....money really isnt that big of a deal, swapping out chips instead of messing with my distributer seems easier and way more precise......any input on wich timing computer, I have all MSD now.