I don't have this engine anymore - sold it. In my notes, I can't find the casting number. Howerver, I do remember reading in Chevrolet by the Numbers, (the early '60's book in this series), that in 1963 there was only one block casting used for a 327. I do remember that the one casting number shown in the Chevrolet by the Numbers book that covered 1963 was the casing number of this engine.
Original VIN# unknown
Pad Stamp: T0209R
T = Tonawanda, NY
0209 = Feb 9
R = 327; 1962-1964 full size Chevrolet, manual transmission.
C B 5 63 The "C" is not clear, it may be some other casting mark.
Block casting date; Feb. 5, 1963