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This will be "close" on the meaning of your engine tag: 352 = engine cubic inch displacement. 65 = model year. 5 = change level (don't ask me what that specifically means). 5D = April, 1965, the month and year your engine was produced. 801J (or whatever it says) = some kind of engine code. Information source: "How to Rebuild Big Block Ford Engines" by Steve Christ. Based on your tag, there's a good chance that's the original engine to your truck. Hope this helps.
Thank you for the decode of the engine tag, user TA455HO said that there is no way to know for certain if the engine is original to the truck. However after knowing that both the truck and engine were both manufactured in April 1965 it would be safe to think that they are both numbers matching correct?
Thank you again for the information from both you and SuperSabre!
No such thing as numbers matching, that's a GM thing.
1965 F100/350 352 engine painted black with painted gold valve covers.
1966 F100/350 352 engine painted Ford Corporate Blue including the valve covers, as were all other 1966/79 FoMoCo engines.
What I see in your engine pic are faded gold valve covers.
So, while there's no guarantee, it could be the original engine...especially if there is some remaining black paint on the block and/or heads.
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1952/65: FoMoCo painted the myriad valve covers a different color than the blocks and heads...as this was how the size of the engines could be identified.
However, the IDIOTS used different valve cover colors for the cars than they used for the trucks, sometimes for the same sized engines. It was a confusing mish-mash!
For example: 1965 Passeneger Car 289 2V: Black engine, gold valve covers / 1965 F100/350 352: Black engine, gold valve covers.
I've done some major cleaning since those pictures were taken, and the block is definitely painted black. The valve covers do have gold that remain on them but after 50 years it is surprising that there is any gold on them at all. Hell even the cast iron manifolds look like they have been here the entire time as well.
However I think I remember seeing in a post somewhere that the '65 352 didn't come with dual exhaust and mine does have it.
I've done some major cleaning since those pictures were taken, and the block is definitely painted black. The valve covers do have gold that remain on them but after 50 years it is surprising that there is any gold on them at all. Hell even the cast iron manifolds look like they have been here the entire time as well.
However I think I remember seeing in a post somewhere that the '65 352 didn't come with dual exhaust and mine does have it. Added after the fact. I too have "been there and done that."
Your truck originally came with a single exhaust, as no Ford truck came with dual exhausts until the Lightning models of the 1990's.
1965/66 F100/350 352 used a heat riser valve located on the left exhaust manifold. Inlet pipe routed from the left side to the right side (see pic below).
I had the same setup on my former 1965 F100 352 until I installed dual exhausts in 1982.
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