Probably not much help but I would look for some old NOS Mopar or old stock TRW or Crower lifters from way back instead of dealing with some of this crap that is currently made. Maybe check ebay. I have a set waiting for me when I do my cam swap. A few years ago I ordered a MP cam and the lifters were chipped along the edges on the bottom of the lifters. I sent it back.
Luckily so far I never had a issue with bad lifters. Honestly it sounds like you just got hold of some crap lifters if the oiling is good to the rockers. How do the ticking/tapping lifters feel in the bores (tight or loose?)Was it tapping before the cam change?
Infact I've had the same result with two sets of lifters 822-16 of Comp Cam and a nightmare experience with the pro-magnum 867-16 still Comp cam. I'm not saying this Company sells bad products, maybe my problem here is not poor lifters at all. Before cam change I did not have issues with clattering , the previous cam had lift under .500" and I had the stock not-adjustable stamped rockers. All lifters fall in their bores very easily with just the friction of oil viscosity.
