I've used NOS Before , loved it.... Nos will cuase minimal loss of engine live ! if used correctly and responibily !!! The safest systems are the EFI (DRY) kit's they allow the NOS and fuel to fully atomize before the mixture enters the intake manifold , and shut down if they sense a drop in fuel pressure... Never use a shot to big for the motor to handle on ford V6 I would say nomore than a 75 shot , thats about 62 H.P's to the ground , if that's not enough for you than look into a custom turboset-up (about $ 3000+) You could go 100+ shot but for how long???? I would recommend a EFI kit to anybody if they don't push the limit of the motor... Also consider this, Nos kit, adjustable fuel riser, air/fuel guage ,nos pressure guage ,misc. will cost $775 aprox. + pro-intall if needed avg. $150 = $925 and then an avg. of $35 to re-fill the bottle depending on the shot , that should be good for12 QM runs. So if you re-fill the bottle once a week =$1820 a year ,My point (sorry to ramble on) Invest all that $$$$ and buy a SUPERCHARGER...