Block, head, intake manifold, waterpump, valve cover, side cover, timing cover, crankshaft pulley, oil pan are all dark machine blue gray.
There are several companys that sell the paint and you have to be wary as some are the wrong shades and even wrong color. Usually the engine was painted after assembly.
All bolt on items, generator, gen bracket, dist.,starter, air cleaner, crankcase breather tube are black. air cleaner has a decal that is available.
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Walt D
1934 Mstr 4 dr/sidemnts
1937 1/2 ton P/U
1953 Bel Air HT
1946 Aeronca 7-AC Champ