I have never used the cam saver lifters. But I have several times grooved the lifter bores. Does about the same thing, and you can use any lifter you want. Lifters spin in the bores so the relief will splash oil in a circular pattern. Groving the lifter bore puts the extra oil on the lobe where you need it, the spinning lifter does not affect the spray. http://www.enginebuildermag.com/2006/07/vizards-view-avoiding-flat-tappet-cam-and-lifter-failure/

article by Vizard on making cams live.