I would get the block casing number and serial number, see what vehicle production periods it was used on, and if you are going to sell it, sell it using the block casting number and serial numbers alongside it, and SELL IT TO A NUMBERS MATCHING PERSON, you will get the highest amount for it if someone wants that block casting number and specific serial number sequence, like for a 100 point show car. It would be a shame to you and the engine if it was purchased by someone who just wanted an engine for something other than the collectible it appears it is from... Note if possible if it is standard bore or .010, .020, .030, etc oversize, or have someone measure the bore size to get the highest dollar value, so a buyer will know what they are getting before delivery... About 5 years ago, I almost sold a 57 Chevy Carter WCFB 4 barrel carburetor for a lot lower than I received, but a question came in and the buyer wanted the numbers from it for a 100-type point show car, he was willing to pay a lot more for it than I had thought it would go for. It sold for around $300, and it had last been used about 25 years ago...

Well I guess it all depends on the condition of your motor. could range from $500 to a couple thousand.