Nobody is as scared as I am. ROFL
Chas, I think you're in the ballpark on the horsepower/peaks.
As for the dry sump stuff, I would venture to say that the power it takes to drive a pump shaft and regular
oil pump is probably about the same as the power it takes to drive an external pump.
However, as Mat said, the vacuum part of the pump will help things. I'm not going to pull a great deal of vacuum on it, there's really no reason to. I'd rather pull 8-12 on it instead of risk pulling the
oil off the wrist pins.....