4wheel drive tranny

It's supposed to be good but I don't know that for sure, so I'm thinking it's worth $150 as a core.
I also have a '75 3/4 ton 4x4 truck with a 400/auto in it. I think it has the divorced transfer case but I need to check to make sure. Anyway, I'd take $500 for the whole truck.
Thanks,
Dallas