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Well let's see now, 1st you've used a GM designation & I believe used the C.I.'s for GM's I-6 engine.
Are you asking about FoMoCo's '59 Ford F-100 "Styleside" w/ a 223c.i. I-6 engine?
If this is the Case, it is supposed to have a Black Engine Block & as I recall, a Vermillion Valve Cover w/ a Black A/C Can along w/ the rest of the parts being Black.
Oh & by-the-by, the other FoMoCo designation is "Flareside".
Hope this helps.