Engine markings and information

I picked up my "original engine" from my 1965 Dodge Dart 270 convertible. The markings on the side is as follows: 24634805 can anyone tell me what this number means? Also I think it is a 225 but how can I be sure? Other numbers I see are 12224 and 1208 also see a code J AAQO does anyone know these markings.

Thanks so much

Bill