I would look into that vac pump idea very seriously. If the car is making good power and starts and runs well there is no way I would tear it apart.

Taking one of these engines down is so much work it seems a shame to try to skrimp on parts when doing so.

Though I don't advocate replaciing any parts that are within specs.

Tom

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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.