I have a ramjet 350 i installed in a 69 chevy longbed pickup. i mated it to a 4l60e trannny and 4:10 rearend. It runs great but i am experiencing poor fuel mileage, about 7 mpg. the thing is i was getting about 30% better until recently. i have done top to bottom diagnosis and can find nothing wrong. i did a fuel injector balance test and the fuel pressure drop comparison between all injectors was within specs. but i was surprised the total average pressure drop was about 40 psi. does that sound like a lot, or is it just a function of how long the injectors run during the test? if anyone has any ideas, im stumped.