JET performance chip?

I ordered on of these Stage 1 chips the other day and my question is has anyone used one of these and do they make a noticeable difference or did I just waste $120 for nothing? and my second question is if I build a 350 to replace my 305 can I get the chip reprogramed for the 350 or am I screwed? thanks for the help. :)

Question 1) They're essentially useless. Waste of money IMO.
Question 2) Highly doubt the "out of the box" chip can be reprogrammed. Put a 350 in it and you're screwed out of a chip.

I say ya just build a mild 355ci. SBC for nitrous use.
Cast crank, forged rods/pistons, AFR 185cc heads, Victor Jr. Manifold and a plate kit...Run a 3.73 gear and 26" ET Street. :D Car would move good.

so they are pretty much useless and I can't reprogram it aye. that figures :mad: . well my idea is to built a 350 for it I just need to get money :( but I'm trying to buy stuff that will work for my 305 and a 350 so I can transfer it over when I build one for it. well that kinda sucks hopefully it at least does something for me or I'll be pretty angry that I wasted $120 on a worthless chip :mad: :)