Just acquired a 1966 dated Hemi block still with a 4.25 bore and the deck height is 10. 727 & 10.732 . After cleaning the block there are letters stamped into the oil pan rail drivers side E,C,D & D & passenger side E,C,D & E. I don't recall ever seeing an explanation of what these marks are for. Any one have an explanation? Max Wedge Gene [Non-text portions of this message have been removed] ---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! '62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html. b7yoMz.