I'm looking for a dart, can't decide what year!

If you plan on putting a big block in, the '67-76 have the bigger engine compartment.
Looks are a matter of opinion.....get what looks good to you. The earlier ones usually cost more and are harder to find some parts. The '73-up ones have the large bolt pattern wheels option, electronic ignition as standard equipment, stronger bumpers, and better price and parts availability. The '67-72 have the factory 8 3/4 option but small bolt pattern. Most options can be changed around so find what looks good for the right price and then build it the way you want.