Love my new engine/trans;hate the MPG!

[Lee H]

Agree with Scott, needs tuned. The 383 in my 72 is 352HP @ 4,929 and 393TRQ @ 3,644 at the rear wheels, coupled with a 350THM and I'm getting 12 as my DD, and I'm not gentle with the skinny pedal. Running a quick fuel 750 four barrel.

[LuckyScott]

I have always wondered why nobody makes a crate "Milage" motor. Every crate motor is more horsepower than stock. I would love somebody to come out with a small block chevy motor designed for good gas milage.

My 72 suburban gets 13 MPG with the stock 350 motor. Dual exhaust, HEI distributer with a custom curve. edelbrock intake manifold. Quadrajet carb. Carb has very small primaries so if you keep your foot out of it it uses just the primaries. It has been rebuilt by a custom carb shop.

You put a high horsepower motor in, it will use more gas.....