Well - I checked Timken's recommendation, and according to their catalog I have the correct bearings. Sadly, I had them pressed in by my local mechanic and he didn't keep the old set, so I don't have anything to compare the new ones to.
Is there any kind of independent way to verify the fit? Distance from axle end to axle end when installed?
Foolishly, I didn't take any pictures of the hub before I took them off the rear-end. When I put the outer bolt onto the hub and tighten it to where I think it should be, it is just about flush with the end of the axle tube. My memory is that there was about 1/8 of an inch remaining of the tube when the hub was taken off.