need some opinions. looking to build a new engine for my truck and cant decide on what size. want to stay low block as i have a few 230 casting 400's and a date coded 400 for it.(would use it if i went just a 400) this is a street driven truck but looking for some good power without going totally broke on fuel. i cant see a 470 being that much worse on fuel than a 400, correct?

so what would you guys build? i would like to use my stealth heads and rpm intake for the build. this thing will never go to the track (too slow) and will see all highway miles. hyd cam, big torque low rpm would be great


any opinions would be appreciated.