Hi volume oil pump vs standard volume pump

And so it was. I stand corrected. Always thought it was E58
.
I did too but I was corrected by a fellow FABO member. We have a 78 LRE. I gave it to my wife for our 3rd anniversary about 27 years ago. It's stashed in the barn for the winter.

I put a new oil pump in it and when it warms up the pressure drops from 50 psi to around 10 psi.