360 or 440 for my 1970 dart daily driver

Hey guys jus need some opinions on what i should do with my car. I want a build that will have decent mileage and lots of power i will be street racing this car at stoplights and also doing canyon cruises. But i also want gobs of power on tap. Any suggestions? Mileage above 15?

Here's a 413 and trans...1972 mopar 413 and 727

Kinda pricey, but an idea.

There is no way you will be able to get 15 mpg with a big block. Scientific fact, as an object approaches the speed of light it's mass increases. That goes double for the mass of your gas pedal foot in a Mopar with a big block.

Let's be honest with ourselves, you do NOT get a muscle car if you give a **** about gas mileage or global warming. If you do care about that crap, get a faggy little prius and go drink your lattes and your expensive bottled glacier water and feel superior to all of us unwashed, blue collar, plebians while you drive to your yoga pilates classes as you bemoan the fate of the People's Democratic Republic of Commiefornia under the Unjust and Evil Overlordship of President Elect Trump, and how he will set back the Righteous Cause of Saving the World from us lowly carbon burning cretins.

By the way, go to to the track to race. People drive their families about on public roads and it is very uncool to put others' lives and health at risk for your thrills.