getting a car

Dale, congrats on getting a Mopar!
You do realize you've just been adopted by about 200 old-school Mopar guys, right?
Don't get discouraged when you get the car. Remember, it's 50 years old..probably a lot of things to fix on it before you can worry about putting a Hemi into it.
Don't fixate too much on the 'hemi' thing. A good running 340 Duster is a pretty stout little car.. I'd have no worries at the lights pulling up next to a newer hemi Charger with a 340 A-body.