Police Interceptor Heads?

If the OP's aforementioned heads have 2.02 valves, and are in good usable shape, then they would be a decent deal. DO as RF360 says, get the casting #, post a few pix here, and measure the valve diameters directly yourself; the seller may be a fellow (you would have a better idea) but may be a BS artist working in his true medium.

If 'twer me, I'd pull a couple of springs & valves. Then you can wiggle the valves in the guides and get some idea of the general condition of wear, and look at seats, seals, etc. Exhaust valve guides tend to wear faster, but I'd pull 1 of each type (in and ex) on each head.

And of course, they can be cracked somewhere, so you'll never know that until they are pressure tested.