USB 1.1, yes, possibly. Beyond that, your logic is spot on. I don't know which Mac 601 architecture (Piltdown, Catalyst, Cold Fusion, Carl Sagan, TNT) the PowerCurve approximates, but it will have to be PCI rather than NuBus, or no-go at all. Even then it may be a struggle, or a slightly faster struggle with a G3 upgrade installed. And (at least) OS 8.6 installed.
de
de