Hey Alan,
I got the block around 8-10 years ago and thought about building it for my Challenger, but I went with a 360 since it was cheaper to build and had more displacement. When I got it, it had an aftermarket single plane intake and some cheap 360 heads. I doubt I still have the pistons, but I can check at my father's place one of these days. The rods are currently in my father's 360, in his Dart. I no longer have the intake, but I can include some old truck 360 heads and 360 rods with it for cores.
It is not a complete short block, so I would not expect $300 for it. Let me know what you think.