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That's a 30's or 40's flathead, I think it may be a 221 c.i. It could work but the fan likely won't work with the truck radiator and shroud and it's not likely to be worth trying.
The water pumps beiing in the head identifies it as very early. Not a great design, very expensive crankshaft/rod bearings. I'd look elsewhere. Where are you? I have sources for flatheads.
The spark plugs stand out as they look like huge original ports fitted with a bushing to allow more modern size.
Probably 'non-foulers' commonly used on worn engines that pumped so much excessive oil into the cylinders that they fouled the plugs quickly. They shroud the end of spark plug and reduce the amount of oil contamination while also reducing the amount of spark to ignite the fuel charge. Basically a band-aid on a gun-shot wound and the first indication of a worn out engine.
Unless you need that particular series engine, it is a boat anchor. Don't trash it, someone may want parts of it. I thought the very early series had floating bearing inserts on the rods. Could be wrong on the bearings, it has been a long time.
As others have stated that is a 1932-1936 motor. The intake is 34 or later. Depending on the condition of the block and what block it is it may or may not be that desirable. The block can be identified by the oil pan rail, area between the water inlets and distributor, and the spacing of the main cap bolts. For details see the big block identification thread we did over on the Ford Barn: Engine block I.D. pictures - The Ford Barn
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