I previously had 2 cork gaskets and a metal windage tray. Now I have a windage tray rubber gasket combo. Probably a 1/8-3/16" shorter. Since I use studs and the gasket is rubber and no RTV is used, I am tightening the pan up and it could press up against the pickup and either plug it or crack it. No way to feel that happening. I should have remeasured the drop of the pickup but I did not. The pan and pickup were used for many miles. The pickup is a 440 source pickup designed for stroker motors. It is narrow at the threaded end so that is does not hit the crank..
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Many pickups are welded by the threads and the flange hits the crank. I cannot see the bottom end of this pickup to see if there are stops, say 1/16-1/8 inch to prevent it from sealing against the bottom of the pan. If I measured before to get it close, I could have had it 1/16" away.