Can't read the pic you posted above, sorry if I'm repeating what's on there.
T = 1963 41 = 413 42 = 426
I can't quite read the date either, if 126 Jan. 26 1963, if 1126 Nov. 1962. whichever it is should still have a 1962 casting date or a very early 1963.
I didn't have my coffee yet.
Jim