Right Carb for my 340

Well I put on a AVS from a 1969 383 motor manual trans from Calf.--I love E-bay--needed a accel pump and a bit of cleaning--looks very nice for 40 years old.

Was hoping to improve my 10 mpg 318 motor with MP 360 heads-308's. It didn't! In fact I believe I lost 1 mpg. Ran OK--it wasn't rich, ran with choke left open, could feel it was lean for the first few mins. in the morning. The secondarys I went from .091 to .095 was the best seat of the pants. It was down a little on power from my race Demon 650 dp...mid range it pulled almost if not the same as my Demon but top and bottom end was down.

Funny thou, it rev to 6200 a bit quicker--my demon hits 5800 before slowing a bit--have 3.91 gears.

I had it on for 4 days and $60 bucks worth of gas, this afternoon the Demon went back on and will stay 8)

I think my MPG is better with the Demon cause I need to push less on the gas pedal to accel as quick. I did not drive it easy, just my normal hot rodding around our muti-lane 55 and 70 mph zones.

I am keeping the AVS thou...its great if it needs to go to a repair shop--even starting the motor it make less noise and feels more like a "normal car"..not a race car :love7:

I believe the AVS was all stock too...now if I babied it, maybe then the MPG would have been better but I have a 1992 Olds that gets 21 mpg if I want good mileage.