Needing help id'ing a manual trans

[sir_talk_alot]

I have had zero response in drivetrain so im hoping you guys can help. Ive got a transmission i pulled out of a truck, and i dont think its original.. The only #s i can find is on the side i found 3731911 and the tail has 3790570. It has gm 4. Then it looks like 182 possibly before it lists 3731911. Anyone know what this is from? Thanks
And is the bellhousing the same for a v8 as an l6?
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