(Never knew of Chry to paint wheels body color, as a general rule for "wheel cover" cars.)
Satin black.
The chassis black which many sell is too shiney and hard of a gloss, by observation. What you want is what the black air cleaners and black engine brackets were painted with. What I found to be an exact match to the engine brackets and air cleaner used to be GM Gloss Black Engine Paint, which was more satin than "gloss". Not sure if any GM dealer still might carry it or what the new part number might be. Even brushed it onto the metal a/c lines on my '67 Newport and it all matched what was already there. FWIW
Just some thoughts,
CBODY67