[JoePientaJr]

I am curious if anyone here has seen a 3946052 engine block like this one. I’m fairly certain this is not a winter foundry block. It has two #2 ink stampings on the left and right side of the front of the block. (Almost like it’s a test block #2) Also it has 19639-D on the front suffix pad location. Thanks in advance, any help would be appreciated.