RE: 440 or 426?
Hey, if we're now throwing all engines into the mix, I'd have to say the 383 OVERALL. Great reliability, beat them to hell & back, good performance, and inexpensive to run & modify.
Also, the 383 road runners, cuda, Chargers, Superbees, etc., are truly who made a great deal of the mopar glory on the street simply because most consumers did not have the $$ for a 440 or a hemi.
So I vote for the Roger Dangerfield of the group...