Please help!! no oil pressure after oil change!!

Pump O rings and gasket? There's an O ring on the pump snout

Yep, the gasket was in place and the O ring too, but the O ring was quite "flat" but I belive it was good enough not leaking.

I"m still baffled as to what happened. Everything was fine, you changed oil and then nothing. (Thinking out loud)

Me too...

I would take another look at that intermediate shaft and try to assure myself the shaft is not slipping. Also it's possible the gerotor shaft could have spun if something bound up the pump.

I force it now when it was dismounted but no slip.

Assure yourself the dist. gear is not spinning on the shaft. This is possible with some of them.

Well it looks like that the shaft drives the dist and the oil pump and the gear drives the shaft, so if it's spinning then the dist would not rotate either, but it does.
Hopefully I'll get the new parts tomorrow and I can spend a few hours inte the garage.