I remember this exact same thing. But when someone brought it up everyone shot it down cause the chevy's were so cheap. Now that they are four times as expensive they are popular? Wish I could find those old threads about Chevy bearings for 911s...
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I read somewhere that the Clevite 77 bearings for a domestic engine (Chevy) are suitably sized for 911 journals (rod and main?). Don't recall if main journals were modified to fit. However, all that must be confirmed. Perhaps the folks at Automobile Associates of Canton can verify.
In addition, I recall using 77 bearings in a domestic build many years ago. They're a relatively "hard" bearing for high rpm use (ideal for a race engine), with a top layer material hard enough to make the journal the sacrificial partner (on a domestic forged steel crank). YMMV on a properly heat-treated Porsche crank.
FWIW,
Sherwood
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