I have had this block for a few years. I was moving stuff around today and figured I would check out the numbers. I wasn't planning to sell the block, but I would be interested in reuniting it with the original car. The second digit was hard to read. It could have been a "K" or an "R". Obviously, it isn't from a Mustang, since there weren't any 429CJ Mustangs in 1970. But, I don't know which plants the 1970 Torinos/Cyclones were built in. Let me know if you have this car or know who does.