340 Lifter failure, now what

I lubed the sides of the lifters in motor oil and the faces of them with Crower’s ZPaste and acting as if new break in... if I ever get to that point while sorting rockers, shafts, and pushrods. Oh and when installing each lifter I verified that it could easily rotate in the bores and move up and down etc. so as long as the cam rotates them... should be ok.
Hmmmmm
Im not big on using used parts in particular flat tappet cams. I have had to many bad experiences in past decades. For the cost of cam and some gaskets I would have replaced it.
Only time and miles will tell.
I wish you the best of luck.