question about exhaust manifolds

[rustythumb]

was looking at a friend's '41 merc the other day & noticed that it's left manifold has it's outlet further forward than my ford manifold. [evidently to clear the steering box] the ford parts book seems to show the same part # for ford & merc. can any one explain this? also, does anyone know of any photos of all the different stock exhaust manifolds made by ford? thanks!

[V8COOPMAN]

Originally Posted by rustythumb

was looking at a friend's '41 merc the other day & noticed that it's left manifold has it's outlet further forward than my ford manifold. [evidently to clear the steering box] the ford parts book seems to show the same part # for ford & merc. can any one explain this? also, does anyone know of any photos of all the different stock exhaust manifolds made by ford? thanks!

The base number for a left hand manifold WOULD be the same for a Ford and the Merc, but are you sure that the PREFIX number for the Merc wasn't different than the Ford PREFIX? I'm guessing that the Ford prefix for a '41 would be "11A-", whereas a '41 Merc would probably have a "19A-" prefix. I don't have a parts reference handy at the moment. DD

[Gary in La.]

The Ford prefix is (78) and the Merc prefix is (19A) for the 1941 L/H exhaust manifold.

These numbers were verified with the 1938-46 FORD & MERCURY illustrated parts catalog.

[Mart]

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I have 2 lh manifolds that have the exhaust outlet further forward than some others I have. I think it's just a early/late thing rather than a Ford/Merc thing. My later manifolds have the outlet further forward than the earlier type. The earlier ones are more log like, the later ones have at least a small attempt at improving the gas flow. Both the ones with the outlet further forward came on 59A engines, though that proves nothing, I guess.

If anyone can say for sure whether Ford/Merc or early late, I would find that info interesting.

Mart.