i say spray. i had 87 timming on my truck with a hypertch programmer. you should be fine with a 150. at the time i had stock plugs a thermo to. Learned my lesson though with nos. got greedy and went 200 maybe 225 i was running dual foggers with like 47 30 jets in both of them. my bottle pressure was at about 1050psi. it hit hard as soon as i hit the button my ass end dropped and hit the notch. i still won the race though. I was just stupid though i should have had the thing tuned and atleast had colder plugs. my buddie was running same set up as me to but he had a 2wheel drive lifted on 36s. He was a little dumber though he ran 87 all the time. it held though... how did that cam ever work out for you???
old set up: 2002 chevy 5.3, procharger 12lbs boost, asm headers, ls1 edit, flames, 20inch budniks
New Set up: 2004 chevy 5.3 ext cab, 12 inch twisted suspension lift, 36's, exhaust.
future mods: 150-200 shot, ls1 edit, air intake, stall, 5.13 gears, 12s or bust