I have a 331 with AFR 185 heads and its safe to say that when tuned it should make about 400 HP N/A. I am using 30 lb. injectors. I had this engine in my 90 GT but I am installing it into my 95 in the coming weeks. I do have the 04 PMS system. I was thinking about the 90 MM Lightning meter and I know that its calibrated for 42's in a LIGHTNING. Can the PMS make it work with 30's in my Stang (w/ the adaptor of course)? When I step up to a power adder in the future and I go with bigger injectors, can the PMS compensate for this injector change with the same meter? I still have a C&L 80mm from my old car sitting around with the 30lb sample tube installed and a 42lb sample tube hiding somewhere around here. Basically, my question is: Is the C&L 80 mm a better option for me or should I sell it and get the Lightning 90mm? KEEP IN MIND, I DO HAVE A PMS. Thanks, I appreciate your help guys. Sorry so long. I also posted this in at www.stangtuning.com