Thread: Ford 390 Cast Iron Exhaust Manifolds

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I worked in a Ford dealership from 1965 to 1971. Saw many of the manifolds that are shown in your photo. We called them "Police" manifolds as they were larger than the flat stockers and smaller and shorter than the long 427 manifolds. They were used on all of the big Ford Arizona Highway Patrol cars during that time period. They were finally replaced with the Cobra Jet FE exhaust manifolds. 2 1/2" exhaust works nicely with the outlet size.

The "C" on the part means it's made/for a 1960's car. The second number (after the C) is the year, ie: C0=1960, C2=1962. Yes, they used the original part number until the part was changed or improved. So.....your right manifold is a later design than the left manifold and they could have come new on the same vehicle. It was not an "old part", just a earlier part number on a new car.