Solid Flat Tappet on Hydraulic Cam?

Is this a no-no? Ive heard of solid lifters on hydraulic roller cams but not the other way around. I want to go solid lifter on my 360 72 d100 but im not liking what i see as far as the rpm ranges go. Its .40 over 2.02 ported J heads with 3.23. The cam thats in there is a summit 1789.

Thanks.