I've got a Vortech v-1, and I wish I had went with a procharger, mainly because it has an intercooler with the kit. I had to get a custom one (before paxton came out with one) to use with my setup. Also I got my tuning done at LaRocca's and they seem to get a little more power out of them over the vortech's. Either brand, difference is night and day over stock.
I have a Procharger p-1sc on my 98 gt. i like the kit overall. 3 year warranty, self contaned, boost-a-pump and comes with an intercoller. what i didn't like with the kit was a fmu, no injectors and when i got it tuned my numbers were 312rwhp and 352 pounds torque. i thought that was pretty low, but i am otherwise stock besides the procharger kit.
"98Gt" what was your rwhp with the vortech?
I just had my 98Gt done yesterday at La Roccos with a s-trim vortech,
320rwhp with 3.90diff I though this was great for my setup.
The main reason for the intercooler was to increase how much boost I could run, I'm running a solid 10# with the occasional spike to 11#. I'm not 100% sure on my dyno numbers, I'll have to dig up my old sheets. With the setup at that time, I think I made something like 340-350 rwhp, and 390-400rwtq with a 3.73 rear and tremec TKO with a spec aluminum flywheel. Also afm powerpipe and bassani catted x, and bassani catback.
What you guys really need is the PI intake and some stg 2 blower cams and springs. The NPI heads really are not very bad at all, they flow pretty close to what the PIs do, its the intake that is killing the power with the NPIs. With cams, and intke I think you guys could make about 400RWHP.