I have the opportunity to pick up a 67 Dodge Monaco 500 with a 383 2bbl/727, AC, power windows, power seats, buckets, all the chrome but a few rusty bits for 3000. I'm looking to swap the engine/trans into the Challenger and I have a 4bbl intake for a 383 sitting in my garage. Or there's a 440 4bbl/727 with new oil pump, headers and aluminum intake. Both engines are running but I haven't heard the 440 since it's out of the car. The 440 came out of a motor home, but it's a 1970 block. I don't know what's been done to it internally yet but I'm going to see it tomorrow.
I'll post pics of the Monaco when I figure out how to send from my new phone