My Jan. 65 built 350HP engine fuel pump has instead of a stamping on the flange, with the number 40083,There is a foil tag with AC encircled below this is the number 40083 stamped into the foil tag.The foil tag is attached by one of the upper bowl? attaching screws. Is this another replacement part? There are no AC letters cast into this this pump. Also where are 65 wheel stampings located on the wheels. Also, does anyone know what bellhousing #3840383 were used for for? It looks identical to #3858403. It came on my 65 small block.