You think so? Even though I have all the pieces and parts (valves, springs, keepers, etc.) to build them up?
What's the general cost for a machinist to look it all over and make them right, if necessary?
My machine charges $250 for a valve job, bowl clean up and spring seat pressures, but that's no parts included and no real head issues on quality heads.
If the ports have to be reworked, the heads aren't flat and the valvetrain geometry is poor, the price goes up substaintially.
I know milling is another $100, forgot how much to mach up the heads with the intake to port match costs (not gasket match).
Springs depending on your cam.
It adds up quick.
I wouldn't want to be any more money in them than you could sell them for.
If they were a used set of afr's or tw's, you would barely take a loss if you invested money in them, that can't be said about all heads.
Last car i saw with them was a carb'ed 408 (or similar can't remember but it was a 351 based stroker) and it made around 360 if i remember correctly. Not exactly setting the world on fire for a 408.
BUT, that set had not been to a machine shop and the engine was a home grown debacle, so....
Edit: as i re-read your post you asked what it would cost to look at them.
From my experience, there is no looking at them, i'd say the minimum is a valve job, which my buddy who owns the shop that puts most of the cars together has traditionally required, whether you like it or not due to inconsistancies in heads.
