Original aluminium intake manifolds

[KTM]

I have ´67 L79 intake manifold and does Chevrolet paint them or where they unpainted? This particular manifold is painted with silver, but I don´t know if it is done by some previous owner or factory.

 

[JohnZ]

The NCRS '67 Technical Manual & Judging Guide says the L-79 aluminum intake manifold was painted silver at the engine plant.