5.2/5.9 Magnum roller lifter limits

What are the known limits to stock mopar magnum lifters with respect to lift and spring pressures?

At about .375" lobe lift, they will want to fall out of the dog-bone so we usually keep the lobe lift to around .360" with the magnum stuff. We've ran ~660lbs. over the nose using a factory magnum lifter that we "made" solid.

Would this still be the case with the Mopar Magnum Race blocks with the Mopar tappet retaining kit P5155275?

I'm not sure as our stuff was all factory production.

What about if one would use Crane 70530-16 lifters? apparently these are supposed to be a bit taller than stock (according to their description).

Crane's web page

Never mind the above statement... read through their entire product bulletin (after I finally found it), and it looks like the extended travel replacement lifters are for chevy only.