They are solid aluminum. The cam simply runs in it with oil pressure. I'll sell you the set of three for $50. I'm not interested in breaking up the set though. If you could get lucky and find someone who broke a different one you might get lucky and get the singleton you need.
Tom W
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual. [SIGPIC]
..I also have a 427 Cobra replica with an aluminum chassis.
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