recently replaced my original 216 with a 235 from a 61 impala. Rebuilt the Rochester carb, and everything seems to be running fine, starts great drives out well, no complaints so I decided to check for gas milage since my gas gauge isn't working. I put the 235 into my 49 pickup, I still have original gas tank behind seat. It took 13.4 gallons to fill it up. now I am looking at 6 mpg, should gas milage be that bad? I was figuring maybe 10-12, but 6? I have noticed a slight leak, just enough to get your finger damp at the fuel pump fitting going from tank to fuel pump. Do you guys figure I will just have to live with this bad mpg or is there something I need to look at doing. By the way, I am using non-ethanol gas at 93% is that over-kill or necessary for the older engines. Sure would appreciate some help on this one. Thanks for any intrest an suggestions
