1965 Dodge Dart Charger
Glad they got there safely. To be clear: I've found both the long type and the short type flasher in low-miles original cars, and I've found long ones and short ones NOS under the same part numbers, but I don't know the rhyme or reason (if any) as to which style went in on which date at which factory. It's not a standard-duty/heavy-duty difference; I've found both of those types in both long and short cans. If I were in your position, I'd try out both flashers, decide which one I like best in terms of function (flash rate, click sound) and use that one. But you have two so you could also swap them every week!
Glad they got there safely. To be clear: I've found both the long type and the short type flasher in low-miles original cars, and I've found long ones and short ones NOS under the same part numbers, but I don't know the rhyme or reason (if any) as to which style went in on which date at which factory. It's not a standard-duty/heavy-duty difference; I've found both of those types in both long and short cans. If I were in your position, I'd try out both flashers, decide which one I like best in terms of function (flash rate, click sound) and use that one. But you have two so you could also swap them every week!