They're pretty for a show piece but I'd never use them, even if they were a dime a dozen. From a performance standpoint you are better off with a set of headers. Given their rarity, I'd put them in with all the other NOS cammer stuff; pretty to keep as a show piece but I'd never run them out of fear of ruining them. I saw a black Mach 1 that had a SOHC in it, the engine was rebuilt. Something that caught my eye were the rods that they put back into the engine. They were made by Mickey Thomson. I'd pull them out and put them on display, pretty sure they were aluminum pieces too. They were bulky as hell and had that silvery shine to them that you don't get out of steel.
