What would a used running 460 be worth? Its coming out of a late 70's truck.

My company is going to scrap the work truck for a few hundred bucks, thought about buying it, selling the engine and scraping what was left.

 

I just bought an 86 for $300. The owner said it was a good engine and when I took it apart it was dimensionally in good shape but there is no way it could just be dropped in a different truck. I think they are really only worth the value of the tinware and the brackets and parts. I am not very knowledgable but they just don't seem worth much used and really only a core, too many unknowns.