Never buy a head without the intake. First up, the intake is less common, and secondly you may not come out ahead on the total price.
I think prices for a head and manifold in the US are a bit regional, being cheaper on the West Coast. Range maybe from $550 to $1400, depending very much also on what you're getting extra.
They were mainly fitted to the 1971-75 Falcons and Fairmonts. They have also been found in a few Fairlanes from early in that era. I believe that some were installed into Cortinas, too - but many dispute this point.
There are three main groups of heads, differentiated by casting numbers. The first ones are serialised ARD1DA... on the intake, then the next series were 72DA... and finally 74DA... prefixes. No real differences internally. All had a heat coil for auto choke, that looped around inside the centre exhaust port. All ran a Stromberg WW series carb.
Don't lose sight of the head being only one part of a package. While the 2V motors had a bone stock bottom end, it was a 250 (not a 200), fuel economy was not a concern then, and the engines were brand new.
Watch out for the one head cracked in the US by trying to force-fit a port divider. It sometimes comes up cheap, but needs furnace brazing to fix. It's still the only cracked 2V head I've heard of, and moreover wasn't broken by an Aussie!
Cheers, Adam.