help identifying short or long water pump

[conoco]

Im visiting my brother out of state and he is giving me a ton of new parts for my SBC. I was just hoping someone could identify what my water pump is. These are the only pics I have of mine and I cant measure it since I am not home. I just didn't want to take parts that didn't fit.

If it helps the pictures show my truck. The alternator sits high on the drivers side, power steering pump sits right under that. My truck use to have the AC compressor on the passengers side but that was removed by the PO. Any help would be great. Thank you