Anybody ever convert solid lifters to hydraulic?

I was looking at some of the threads over at slantsix and saw the parts comparison. It's quite the engineering workaround to get hydraulic lifters without changing the block. I would hope clifford would provide correct arms, but that would also require the correct rocker shaft, which isn't mentioned in the kit at all.

Of course I could be way off-base here and this kit is an upgrade, rather than a conversion.