To my surprise

[chiefmd]

Decided to freshen up my 1973 240z the front with new bearings, rotors and brakes. Pulled off both sides and it looks like one side is a 260z hub. I have been driving the car and haven't noticed any

out of the ordinary except a steering wheel vibration a 50-60 mph, which I thought might be bearings/balance. Could the different hubs explain the vibration? Where can I get a 240Z hub<

[siteunseen]

Try zcarsource.com

[Zed Head]

Couldn't he go the other way also and get another 260Z hub.  Might be easier to find.

That first picture implies that the hubs place the wheels on different bases.  But as I understand it all S30's have the same wheel base dimensions.  A better way to take that measurement is with the hubs on a bearing and spindle since it's where the bearing sits that will determine where the rotor ends up.

In short - is there really a functional problem?