383 Block/Crank/Heads

Someone nearby has placed an advertisement selling the above mentioned block, crank, and heads. My question for you guys is the following. What's the potential of the 383? I currently have a 74 Dodge Dart with a 318 but was looking for a future upgrade to a 360. Would it be the same type of mods in order to go with the 383? Or is their something I would need additionally?