They were green like the rest of the engine. These engines were assembled at the Flint engine plant "basically" complete . So when they were painted , everything was engine color. In the one picture link I posted below it mentions "Miscellaneous Brackets" along with the engine assembly procedure for Flint and Tonawanda . Its also shows at what step in assembly it was painted. The other picture shows a green 327 bracket.
https://hosting.photobucket.com/albu...ighres/007.jpg
https://hosting.photobucket.com/albu...s/IMG_6164.jpg