| Big Red | -- 04-27-2012 @ 6:51 PM |
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I have a '51 F1 pickup, with the 239 engine. I purchased a new crossover and exhaust pipe. I installed the crossover, then tried to get the right side to line up, and it doesn't. Someone had told me that the right exhaust manifold appears to be a lighter manifold, and probably isn't original. The number stamped on the left exh. manifold is 21A9461. The right exh. manifold has a stamped number 21-A-9480. Does anyone know if these are correct exh. manifolds for the engine? I've appreciated help in the past, and will thank anyone ahead of time if you can help. Thanks
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| 51f1 | -- 04-28-2012 @ 1:35 AM |
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The part numbers for the manifolds are 7RT-9430 and 7RT-9431. If the numbers cast into your manifolds are the part numbers, you have the wrong manifolds. Richard
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| supereal | -- 04-28-2012 @ 11:19 AM |
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Rather than replace the manifolds, which is costly, have a good muffler shop make up a crossover pipe that fits.
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| Big Red | -- 04-30-2012 @ 6:44 AM |
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Richard - Are the numbers stamped on the manifolds usually the part numbers? I'm new to the flathead engines, and am trying to resolve this problem. Thanks for you reply. Big Red
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| supereal | -- 04-30-2012 @ 10:13 AM |
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Neither of those numbers appear in the green book. The prefix 21A is usually associated with 42-48 Fords. 9430/31 is the part number family for exhaust manifolds as Richard pointed out. 7RT are the customary parts for the later 8BA enines used in trucks. For instance, RT water pumps are also used to provide front motor mounts in early chassis. Old vehicles had many junkyard swaps over the years, and finding odd combinations is not rare.
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