Thanks again gentlemen. I cleaned up the block today and here"s the #"s I found:
Left side of engine has a raised casting number of "T6"
Right side of engine has large raised casting number "D4NN6015F"
A plate that was installed with a couple screws has "4K22"
A circular plate with a center screw, looks like it could be turned and has the numbers 0-9. It"s set to a mark halfway between 5 and 6.
Stamped number where the block mates with the oil pan of "C679302"
3 sets of stamped numbers where the front of the engine bolts to the frame has "F", then below that is "60L14", and below that is "4L5B"
Interesting note: I have done a good amount of repairs, installing parts, sandblasting parts , painting and replacing and have never come across any Blue paint anywhere. Looks like 2 different coats of similiar yellows and underneath red primer.