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Based on your replacing a copper/asbestos head gasket, it's been a LONG time since someone's been into that engine (perhaps never). IMHO, it's very likely that it needs rings. Good news is that's likely ALL it needs. I'd recommend you plan on pulling the engine (at your convenience, good therapeutic winter job) and going through it.
Bearings may be fine - do some diagnostics on your oil pressure. How is your oil pressure currently? What pressures do you get if you tighten/loosen the oil pressure adjustment?
Dave's tuning suggestions may reduce the blowby to the point where you can live with it until you do the rings. Running the blower (sucker?) will certainly help.
Engine in the shop/basement is a good time to clean it out and convert to glycol cooling (heat exchanger) if you don't already have it.
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