8k rpm ...

yellow rose said
If you had that pan (which is now about impossible to find and I have two of them...one with a 1 inch static pick up and the other with the swinging pick up) then you had the 1 inch pick up tube. That's a massive help right there. A 1/2 inch pick up can't supply that pump much past 7000 RPM without serious issues.

So that was a big deal.

It was just like this one and I still have a new cover some where, one was a conversion from std pump to HV and used a std pump housing and the cover was cut so the long rotor would fit, I had a flat cover that bolted on a HV housing. Now that you said that I think it was about 3/4" I.D. on the tube.