Thanks for the tips. I decided a crank scraper would be a lot of careful cutting and fitting, and the windage tray will hopefully do what it's supposed to, keeping most of the oil away from the crank...

I don't remember where I bought it... could be Milodon or a 440 Source copy shruggy
But I did have to make a cutout so that the pickup could be installed or removed with the tray in place (interferes with the pickup's dogleg bend when turned).

Crank's a stock-stroke 3.75" (RB) in a 400 block. The tray fits fine in the Milodon 30930 pan, so I'm concerned at this point only if the gasket will seal the tray to the pan.
After a close look at a picture of the Superformance #2585, I think it will just barely clear. If not I can do some fine trimming with a sharp knife.
Will report back next week when I get home from a work trip up