I've spent a lot of time researching heads. Odessa says they use CFIC heads and valves from a US supplier in Las Vegas. Heads from ITM seem to be sold mostly as bare units and are reputed to be of decent quality. You can add your own parts to an ITM casting but the cost adds up, especially if you get a machine shop involved. Around here you cannot get in and out of a machine shop for any less than $200, and that is just cleaning and inspection, if that. This makes the complete heads seem pretty attractive, but unless you disassemble and measure everything you have no idea what you are getting. This is always the dilemma with fixing an old engine, and is why the average dude would be time and money ahead by buying a newer better truck. But that wouldn't be any fun would it?