Based on how everyone I came across (3) was covered with surface rust with no evidence of any paint, I'm pretty sure they were natural.
Make that - I'm positive. I looked up my April '99 copy of HPP where they had the 2nd of two articles on Jim Mattison's '67 Ram Air.
The article also says the springs (mono's) were light gray and the rear pumpkin and axle were natural with the back side of the pumpkin painted with cheap 60% gloss black.
2012 Mustang Boss 302 #1918, Competition Orange. FGF replacement 2006 Mustang V6 Pony, Vista Blue. Factory ordered. 2019 BMW X3 (Titled to the wife, but I'm always driving it for her. So I'm claiming it) Old projects, gone but not forgotten: 1967 FB 400, original CA car. After 22 years of work, trashed by the guy who was supposed to paint it. I had to sell it. 1980 Turbo Trans Am 1970 Mustang fastback, 351C 4Bbl, auto 1988 Mustang GT, 5 speed 1983 F-150 4x4, built 302 1994 Chevy K2500 HD 4x4, 454 TBI
