In addition to being in the premium, 2 year warranty range, I've discovered they're made in the good ol' USA. This gives me enough confidence to go ahead and use them, although not without reservations. I do appreciate all your guys feedback. More info on the PR2 range here: http://www.allmakes4x4.com/pr2/brochure.pdf

 

Have you checked on the contact between the rocker arms and those rods? The new push rods look like they are made for your new lifters, just hope they fit the rocker arms as well.

 

I think the OEM pushrods come with the flat spot on top actually because they're all uniformly flat on both ends. Both the new and old tappets/rockers are ball shaped and don't need a flat end pushrod, as far as I can tell.