Solid Flat Tappet on Hydraulic Cam?

the RPM ranges are not really that helpful, I mean almost any cam will operate from idle to 6000.I wish I knew how they make those numbers up,But so far I haven't been able to figure it out.
The .050 numbers will usually tell you pretty close where the cam is gonna make peak power. From there you have a pretty good idea how much higher you are gonna need to twist it to make it work with your transmission ratios. As to the lower end of the range, this is highly dependent on the Scr and cylinder pressure, as well as how you couple it to the chassis.A hi-stall and gears can turn a dog combo into a race-horse.
The thing I like about solids is there is no guessing as to when the valves are on the seats; nor is it 20/30* on down from the advertised. So, on a low-compression engine, you can still build some reasonable pressure.
Hope this helps

I have put solids on factory cams (340 and 318) with no problems.
I have NOT put hydros on any solid lifter cam.