I have roller block (with fuel pump pad drilled!) that I initially built up with a hydraulic cam to recreate a GMPP 330HP 350. Before I ran it, I pulled the cam back out and swapped in a roller. I'm going to reuse the GM 2476 hydraulic cam in a Goodwrench 2pc. 350 that showed up in a parts car. This way, I can have my cake and eat it too. Sometimes procrastination pays off.