Fuel injection

IMO
Unless you plan to race it, a BB is way overkill on the street.
Especially in Darts because of the small factory rear tubs, that can only accept up to 255s. And I mean even a stout 318 can annihilate those in first gear.
If you install a 440, you might as well budget for tubs, relocated springs, and a narrowed rear end. Then, since it's now a fat-tired 440, you might want to install aftermarket axles and/or at least think about a dana.
IMO
for a streeter;
>a nice high-compression 340 and 4-speed auto with 3.91s might fill the bill.
>If you wanna boil the hides to 50 plus mph, make it a 360.