Is this worth it?

87’ should be a pre magnum roller block. The cylinders and lifter bores would be a concern with all the rust. Offer 50 bucks for everything it’s better than what he will get for scrap. I bought a turn key 360/727 for $300 at a junk yard. They are out there. But for 50 bucks drag it to a machine shop, if it’s bad scrap it and keep whatever is still usable.