I've got Edelbrock MPFI on my ('89) 350. It starts and runs okay (no hesitation, stumbling, etc.), but when I went though emissions last week I was about 400% over the limit(s). I just started to look into the problem (checked fuel pressure and it seems fine), so I haven't really exhausted my possiblities for figuring out what's wrong. That said, I'm thinking of taking off the Edelbrock system and re-installing the TBI. (The Edelbrock FI was on the truck when I bought it). Question: how well does the TBI work on a pretty much stock engine? Would I be giving up much power if I go back to TBI? If the air/fuel mixture with the TBI is a lot closer to where it should be, I'm thinking I might actually pick up some power instead of losing it. TIA, Jim P.S.: I searched around for about an hour, but couldn't find the answer. The search function doesn't seem to like sort words like "tbi".