There have been multiple threads in the past about this.
I believe that there may be one scene with the hood up.
As him being a PI , at least the green car blends in. There is one Mannix episode in season 5 where a villain is driving a ‘71 TorRed 383 Road Runner that has a Black and Orange bucket seat interior. The episode has long shots across the mountain roads where you can see the Road Runner a mile away.
I recall an underhood shot showing a 383, complete with the pie tin on the air cleaner. It's been a while since I saw it, but it may have been the '71-dressed-as-a-'72.
