This is of January 19 20 21 and a few other in January they cast plenty of block that ended up in 1971 Hemi Cars. My November 5th 1970 1971 Hemi Cuda has a cast date of either 19 or 20 of January 1970. I also off all things have a 1971 440-6 block that was cast January 20, 1970. So Chrysler was raping up cast both Hemi and 440 block in January of 1970. After these block were used up things started to get unconventional with Cast Dates. My 1971 Hemi Challenger has a Casting date in 1969 and was built in June of 1971. Lots of other build in June of 1971 both E and B Bodies have the 11 11 68 casting on the blocks. This is one example of Chrysel not used First in First out FIFO and was just grabbing the first block closest to the door.