Something different Building for MPG.

Not sure what the m.p.g will be,but here is what I want to do when I buy that 67 Dart.

After suspension and brakes are updated I will do:

Manual steering
Stock 225 slant(or 198 if I can find one,less cubes=less fuel.)
Regular bottom end rebuild.
Fully ported head with O.S valves,340 springs,hardened seats,with ports matched to intake and headers/dutra duals.
Shave head for 9to1 comp
Custom cam grind for more bottom end torque,and better economy.
Dutra Duals or Hooker Headers(not sure here yet)
Y pipe duals into a single 2 1/4 mandrel bent exh. with straight through muffler
Aussie speed 4 bbl intake
Holley 390 4 bbl with stiff secondary spring.
Convert to electronic ignition using GM HEI
Rebuild stock trans,add gear vendors OD(hey I can dream cant I?)
2.94 gears sure grip in a body 8 1/4
Fab/create more efficient cold air intake.
Lightweight alloy wheels

This all in a 67 Dart GT.My dream car with my dream specs! As far as Im concerned as long as I see 20 m.p.g I happy cause I will get about a million smiles per gallon! But I have a feeling that if driven just right,following some of the SAFE and LEGAL hypermiling techniques this set up should see over 30 m.p.g on the highway.

I once had a 70 Dart 4 door(my first car!) with the 225 /6 power steering STOCK 14,000 orignal miles(when I say stock I mean it had the factory tires/belts/and hoses on it when I bought it!)I replaced all necessary items,rebuilt the carb,etc...I would get 20-23 m.p.g in town and 26 m.p.g on the highway following the 65 m.p.h speed limit.This is checking my speedo with the mile markers on the highway.I know most people are convinced that the slant will never get better than the 20's m.p.g,but I think with a more efficient intake/exhaust and overdrive in a lighter car (67 is two door my 70 was 4)I completely expect to see 30 m.p.g:read2: