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

Duane said
Why would you not use one with a double roller. They have some slack in them too, just curious.?

IMHO.... the rubbing block material is the wild card. There have been reports of them falling apart in not too many miles, and I've take one apart from a 4.7 where the rubbing block material was already brittle and cracking apart in a 10 y.o. engine. And then again, some seem to hold up just fine.

So it's a part that can (and has) failed erratically, with no good rhyme or reason that has been identified to my knowledge, other than possibly the materials used. I am not against them... I've raced 6-7k rally stage miles on engines that have them but they were much better built and of good quality materials, and they didn't fail or put plastic bits in the oil. The reports of what is out there for SBM's now seems erratic in quality/durability.