Anyone here use Schubeck lifters ?

So you understand now that the stocker motors are higher rpm pieces but your 408 is not. You also know that this lifter bounce deal generally occurs at higher rpm in those highly specialized stocker motors. Most likely your off-the-shelf-cammed stroker would never see 7,000 rpm. As a real world example, my solid FT cam 416 made it's peak power at 6,000 rpm. It was run up to 6,600 and power started to fall off at 6,300 so any more rpm was just a waste. Conversely, my old stock stroke, solid cam 340 would rev much higher, I shifted it at 7,200.

The ONLY benefit I can see to run these lifters in YOUR particular application would be the cam break in. Beyond that, they are not worth the trouble, even if you got them free. Andy or Ehrenberg will tell you the same thing. You do not need direct experience with Schubeck lifters to understand all this.

Again, if you are concerned about having enough spring pressure to prevent them from bouncing, (which is why you started this thread in the first place) then the lifters are not suited or necessary for the combo.

Buy the correct parts and be done with it.