Engine Serial/Casting Number Compatability Help Wanted

[texaswash]

I have a 2001 Ford F-250. The casting number on the existing engine reads 1825849 C2. The engine serial number reads 74JU2U1580825.

I wanted to put another engine in and bought a long block that was advertised for 1999-2003. When I received the long block, its casting number was found to be 1825849 C1, and the corresponding serial number is 74JU2U516324, suggesting that it is pre-1998.5, and most likely 1997.

Here is my dilemma - I believe I can return the engine since the shipper is, technically, at fault. But it is in such immaculate condition....appears that no rebuild is even required - the oil that was dripping from it was crystal clear and the cylinder walls are perfect (engine delivered with no oil pan).

Can I exchange my newer engine with this one and transfer all sensors, injectors and accessories? Or is this engine so incredibly different that it is not worth it? The most notable difference I see is a 3/4" hole on top of the engine block (Picture 2 below) that I don't think is present on my newer engine. Also, I came across information that older engines use mechanical fuel pump and one-shot injectors, as opposed to my 2001 engine with split-shot and auxiliary electric fuel pump. Is this true?

Please help! I have only 3 days to decide on whether to return or not. Here are some pictures of the long block I just purchased.

[Jake]

They are pretty much the same through the years. The main difference is the bolted on parts.

[texaswash]

Originally Posted by Jake

They are pretty much the same through the years. The main difference is the bolted on parts.

What about injectors, fuel pump, and that strange hole on top of the block?

[Jake]

You are talking about a long block, that means no injectors. You can put any 7.3 injector in any 7.3. The fuel pump is mechanical on the older ones, hence the reason for the hole in the block, there should be an easy way to deal with that as many OBS guys convert their trucks to and electric fuel system.

[texaswash]

So, if I understand correctly, I can use my existing split-shot injectors on an older 7.3 block, and can plug the hole on the top since it will not be used, correct?

What about coupling to the transmission and transferring all the sensors?

[Jarrod B]

Originally Posted by texaswash

What about injectors, fuel pump, and that strange hole on top of the block?

That strange hole is for a lift pump on the 94.5-97 OBS trucks. the 98-2003 have electric fuel pumps and those holes are plugged. now you can get a cap for that if you want and would work fine.

[Jake]

Originally Posted by texaswash

So, if I understand correctly, I can use my existing split-shot injectors on an older 7.3 block, and can plug the hole on the top since it will not be used, correct?

What about coupling to the transmission and transferring all the sensors?

Yeah, you can use everything. It will all bolt up. Including the injectors, trans and sensors.