The only way to be sure of the cam profile would be to use a dial indicator and a degree wheel to plot a graph of the cam lobe profile. That's something virtually all racing engine builders know how to do, and virtually none of the people who pontificate on internet forums understand, let alone could accomplish on a real engine. The difference in a hydraulic and a solid lifter cam is a very short section of each cam lobe where the base circle meets the lifting part of the lobe. To accomplish your compression test, there's a quick work-around. As the distributor rotor aligns itself with each plug wire, loosen both valve adjusters until there is some visible slack in the rocker arms, and then tighten them just enough to eliminate the slack. Once all the valves are adjusted that way, go ahead with the compression test.
If you want a more detailed procedure for doing an accurate hydraulic lifter adjustment, drop me a PM. I have a technique I've been using for over 50 years that works on all hydraulic lifter engines, regardless of the number of cylinders or the make of the vehicle. Good luck!
Jerry
