The Landy and Mopar performance roller tip rockers do not oil the tips very well, especially when the oil is cold. to compensate, I have opened up the groove in the number four cam journal to provide more oil to the valvetrain. also I do not use straight weight oil. I use 1030 or 1040, because it gets oil to the roller tips quicker.
If you are using a flat tappet cam, stock Hemi rockers will be fine.

[img]http://i.imgur.com/boeexFms.jpg[/img]
31 Plymouth Coupe, 392 Hemi, T56 magnum
RS23J71
RS27J77
RP23J71
RO23J71
WM21J8A
I don't regret the things I've done. I only regret the things I didn't do.
"Wise men talk because they have something to say; fools because they have to say something. ~ Plato"