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

Nope, the cam stays it it's position whether the plate is .010 thick or .300 thick.
Hmmm.... confused.... not the 1st time though...! On an LA.... Aren't the lobes are a bit taller at the back than the front so the lifters are constantly trying to push the cam backwards? So the IIRC, the back side of the cam sprocket is riding on the front side of the thrust plate..... and setting the cam location front-to-back, and changing the thickness of the thrust plate would change that location......?? I thought that was the reason for the thrust plate... Or do I have the thrust direction backwards?