A Body BB K Frame

Need some help to indenify a Big Block K-Frame for an A-Body.

I am looking to possibly install my 413cid BB in my 1971 Plyouth Duster and want to know what I am looking for when I go to the Carlisle Chrysler Nationals next weekend.

Please email any information and/or photos to me at [email protected]

Thank You!
KP