Geez, I was a FKIA even back in '02:
"I have a GA and a GC, both 2.0's. The GC case does not have an oil pressure control valve, whereas the GA does. Now some want to tell me that the lack of a control valve (not the pressure relief valve located on the bottom) is a bus motor. And others say that no valve means hydraulic lifters. I have strong reason to belive that both statements are false. First of all, the oil fill on the GC case is in the 914 position; secondly, this motor is a virgin and it has the real deal 2.0 heads complete w/ the EGR holes. So, I think Jake has it, case the same, oil system variations in later years."
Now who'd have thunk that?
BTW, the motor blew up on the 2nd lap of its first day at the track. So, yeah, I was a pretty smart cookie.