Recently purchased a K car and just received my Fourth edition catalog to authenticate. Everything checks out with the exception of the block date code. The warranty plate shows 17M and the date code on the block is 6E26. That should be a Dec. 17,1965 and a May 26, 1966 block. The boss area on block adjacent to timing cover is blank. The block cast is C5AE 6015 E. Warranty block?
Thanks, Richard