[Alan Roehrich]

I've never used those lifters, so I can't say what they require. For Stock I've only sold and used Schubecks or Trend, and never run a restrictor, I do not like restrictors, there are too many components up there that need the oil.

If you're going to try restrictors (I'd try a different lifter instead, but that's just me) I'd suggest doing it on a dyno for short pulls until you can get the restriction where it "needs" to be. With restrictors, you run the risk of giving some critical stuff less oil than it needs, and you could have valvetrain failures as a result. Even if you only do it for a pass or two at the track, the damage might already be done, and not show up for a while.