My car runs good on pump gas too.Only thing is that big lopey idle and the 2 chamber flowmaster mufflers(loud).Other then that I wish i had an overdrive trans for the 4:11 gears.i will probably keep my current set up because I don't even have a good set of aluminum heads yet to benefit all my other high speed parts.The use of NOS is a perfect match with my cars set up.I only use it in 3rd and 4th gear and when i hit the button it is the closest thing to a rocket ship while still getting traction and i also use it on pump gas 94 octane and never have had any problems with nitrous.About 8 or 9 years ago I did break it when I got stupid and over revved it and I lost my rod bearings but all the parts,pistons,crank,rods were in good shape for the rebuild.It looks like I will be staying with old Chevy Rat Power for a while!!