SB Cam Thrust Plate P5249637 no longer made? Only tensioner now?

Let me think of the rotation. The oil pump/distributor drive gear pushes it forward as it's driven I believe.

That's what I was gonna mention, I noticed that difference when working on big blocks, those need more cam thrust support because the distributor drive gear doesn't "push" the cam forward as it rotates. I think? Lol