I have a TBI and probably going to switch to a carb. Its a 355 with the vortec L31 heads, and edelbrock shorty headers. I know every motor is different but going with a 670 holly carb, and those of you that have already had this kind of set up my question is what the expected gas mileage for daily driving would be? I am going to put in 3.43 rear end gears as well and it has a 700r4 lockup tranny. Would I lose that much from switching from tbi to carb? I know performance wise I would gain significantly.