I have been doing some research and have not found the info I am looking for. I have an engine that was given to me for my 1942 Chevy 1/2 ton pick up which I am restoring. The engine is a GMC 6 cylinder with a serial number 228I26672 (that is the letter I, not number 1) and a casting number 6107326. I am trying to find year and displacement for the engine in order to get the correct parts. I believe it is a 1953 vintage 235, but I don't know for sure. See photos. I would really appreciate the help.