360 heads... 465 casting?

Hey,
Anybody know anything about these?
Guy has a 318 for sale cheap... Claimed 360 heads on it, so I asked for more info... He said heads are 465 casting #. But I can't find any listing in any of my books, or links on the web. He said they're similar to J heads, and have no drilling for air injection.
As cheap as it is, I figured it would be a good candidate for a cheap build.
Any info appreciated.