what combo = decent mileage+ power/torque

WONTGETDUSTED said

ok what do you guys think? 318,349,360,408+ cid? what heads? lets keep under $2500 bucks or so? something that will idle well enough to run power brakes and doesnt need a lot of converter and let say a gear range of 2.94 to 3.55 .......i have thought about the 349 stroker but then whats the point when you can build a 360 + for the same money ......but then i dont want to get 10mpg on the interstate either....

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Build a late model roller magnum 318, get a core from the junk yard. Use the stock cam, a performer rpm intake, and a Jet performance quadrajet. I know, I know but they cannot be beat for performance & fuel mileage...we use them alot in our builds, and they work great.
The 360 will get worse mileage with the same gear ratio so you'll need to figure in your vehicle's weight to determine if the 360 can work with a taller gear.
Brian