That's the pan I run on my DD. I love that pan. It has its PITA issues but it's still the best pan for power and durability with a stock K member.
My pan uses the static pick up but the swinging one is just one more way to keep the pick up covered on deceleration. If you are into testing, I'd bet you can run a quart or two lower with the swinging pickup and not uncover it.
Cool stuff. I love old school that hasn't been improved on in 40 years.