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I've seen the coil mounted horizontally on the right side of the intake manifold....and vertically, on the right front of the engine. Where was it mounted at the factory?
A minor technicality is that if thermactor equipped, the coil would be mounted on the intake. That said, a Metuchen built car with a Californian DSO, or a non Californian DSO but with the thermactor option, would be rare. But I bet there was at least one built.
There is a reproduction which is fairly accurate shape - wise but the originals were not painted, they were phosphate and oil finish. The part number is C4DZ-12043-A.
All of them from any plant were mounted to the intake bolt on the passenger side. This engine photo has a lot of problems but the coil location is typical.
Picture you posted is ofBased on unrestore a 68. Appears that the poster was looking for 67 non-thermactor applications Based on all the examples I have the original location would be a carry over from 66 and attached to the face of the passenger side head as shown in the earlier threads about the same subject. Used the words "67 Coil location" and it found them quickly Will be merging this thread and one of those so I don't need to post a link
Late 66 on mine, none thermactor. SJ.