Where is the water level when the pan is at a 45 ?
I performed your 45 degree test this morning.
First I removed 2 qts of water to simulate some amount that will be "upstairs" in a running engine. It could be much more "upstairs" then that, IMO.
Then I tilted the pan back until the liquid level reached the top of the pan where it bolts to the block. This was roughly (by eye) 15 degrees.
With the windage tray bolted-in, I quickly tilted the pan to 45 degrees for about 1 second (a long time IMO). A couple qts of water spilled over. Lots left covering the pickup, which moved to the back of the pan.
I removed the tray to see the water level and pickup at the same time.
Finally I tilted the pan to 45 degrees and held it there allowing water to flow out. The pickup was still covered with about 1.5 to 2.0 qts left in the pan.
I don't know what your 45 degree test means in an actual drag car launch, but those are my observations.
