Incant see the link bar binding, not with the large diameter roller and ( to me) a straighter pushrod will have less oscillation than one that is at a severe lateral angle ( such as a w2) my 440 w2 is running with them just fine.

Arent the Herbert house lifters morels? They are fine but they are pretty heavy compared to the MRLs. I think the morel solids are the same long body they use for the hydraulic rollers so you have a long lifter body but a comparatively short pushrod. I run pushrod oiling with a nearly but not quite totally restricted shaft oiling, its gone 7200 with ease on my 414 so far.