16 MPG ain't all that bad for a hot rod. What may want to consider is go with a carb that's known for delivering better MPG and throw the Holley DP when going racing. Too; I bet your car has high 3 series rear end gears which will kill the freeway MPG.acewiza said:They are cop wheels the PO had put on before selling it to me 6 years ago. It also had a 4-speed when I got it. I initially cleaned up the body and did much tweaking and fixing, intending to daily drive the car util I learned it was only getting around 16mpg. The 650 double pumper appeared to be the culprit, so despite running extremely well, it was obviously going to be more suited to the track. Maybe someday... (sigh).