340 Gets Terrible Gas Mileage

Just for comparison, in my E-body I have a stock cam 69 340, ProFlo4 EFI, 727 trans with a GVOD, 3.23 gears and TTI headers and exhaust. Running to Carlisle from northern Virginia back in July some stops at the beginning and two days running to the fairgrounds and dinner with A/C on part of the time managed 15mpg hand calculated. Filled up on the way to the fairgrounds the last morning and then home after the show got 16.5 mpg hand calculated.

This was with tent and everything else in the car for the weekend and yes I did keep my foot out of it! So yes it is possible to get decent fuel mileage.