No, this kit won't "add them", it's for later hydraulic lifter slant sixes. The earlier, solid lifter engines are oiled differently than the later hydraulic engines. I think the older solid lifter engines can be converted to hydraulic(and vice-versa), but why? Just get the correct solid lifter kit and adjust the valves a couple of times a year.
I've never heard that many positive reviews for Comp Cams for the slant, unless it was a stock-type rebuild. If you want to improve performance, there are better choices.