I have most bolt-ons, including the upcoming addition of Hooker LT headers and o/r x-pipe. I am setting my sights on my next mods. Since I want to stay na, I am looking at polished and ported stock heads and custom cams. The shop that I work with also recommended 30# injectors, pro-m 92 mm MAF, performance valves, locks and springs. What kind of horsepower should I see with these mods? They've estimated around 100 rwhp, which seems kind of steep. Also, if I have all the work done, how much do think it should cost? They are estimating around $4400 for parts and labor.