I have a dealership Chev parts manual that covers up to 1963. It also includes a lot of casting #'s. It has been a lifesaver and I am willing to look up missing #'s if they will help. The part of the book relating to internal engine pieces is missing, so no help there.
Bob

55 Cameo 396 TH 400 with overdrive
65 Caliente conv
67 BB Caliente conv
67 Mercury 1 Ton
76 GMC 3/4 ton 454ci
84 Buick Turbo Regal