Why is it so hard to get good advice !!???

That looks like 1 1/4" clearance from the sealing surface to the backside.
MINE is exactly the same. We have the evidence. The wrong windage tray was shipped! Knowing this, I would think that this one should work on any stock stroke big block. Mine having .400 more stroke would need to be about 1/4" deeper at a minimum.

I went ahead and put the MP steel windage tray back in. I also put in the Milodon 6 quart oil pan. The area of the pan belhind the sump near the bellhousing is actually shallower on the Milodon pan. The chrome pan had small creases in it from the center link hitting it. At rest, the center link used to have about 3/16" of clearance with the chrome pan. I guess the crease was the result of some steering deflection or a pothole in the road. The Milodon pan clears the steering by almost 3/4 inch. SCORE!
I'd still like to try the correct Jegs windage someday, especially if the cork gaskets I used start to leak. I like the idea of a reusable "gasket" even though I dont pull the oil pan very often. Its more of a matter of stopping LEAKS! Also, I poured in 5 quarts of Joe Gibbs break in oil and a bottle of Comp Cams break in supplement. The stick read a quart low afterwards, right about where it should be. Before i put the pan on, I noticed that the dipstick end rests just above the head of the oil pickup.

Next up is resetting the valve lash. Maybe I am being paranoid, but I would feel like a complete *** if I spent all this time and effort, asked advice and pestered every Mopar guy in the Northern hemisphere ONLY to skip this simple thing and wipe the cam.