I have a 1946 1 1/2 ton truck. The engine number is ADEA 232028. This is a little confusing because of the A in front of the normal prefix for a 2nd edition 46 235 engine. What is the deal with that? Also can someone explain the difference between the 1st edition 235 built in 1946 and the 2nd edition? I would like to use the intake and exhaust manifolds off this engine on a 1942 235 engine. The 1946 235 engine is setup, rusted or blown I do not know. Any ideas?