I think I scored. I need a new 3.76 inch stroke steel crank for my 427, and a completely rebuilt 366 came up for auction at our local School board maintenance yard. It was built by a very reputable builder on Vancouver Island and I got it for a high bid of $311. All I really want are the thumb rods and the crank. The heads casting numbers are 473328 which would be an open chamber 68-69 head for a 366 truck. They have been built for propane so I would imagine they would have had hardened seats put into them. I was just wondering if they were worth anything?