New to Mopar
Grinly,
I recently joined too, and will attest to the body of knowledge that exists within. I've posted several questions, and the number of really good and helpful responses has been amazing. If you can't find the answer for an "A Body" question here, it probably can be answered.
And good luck with the Dart. I personally have an old "family heirloom" 1965 Barracuda, but growing up (when it was Dad's main ride), my Uncle had a 65 Dart with a 273 Commando V8. Lots of the parts are interchangeable.