Dwayne,
I have a few NorVels in various sizes and guises. Every one of them came with very detailed operating instructions, even the earlier AME version engines. Those instructions covered fuels required for break-in and after-break-in use, break-in process (the usual for ABC/AAC/ABN type engines, pretty much), props, etc.
Following the manufacturer recommendations, you'll will seldom go wrong. If you don't have the instructions, I might be able to scan them into a document for you.
NorVel engines are generally good runners, FAST RPM preferred, and easy to handle. Earliest metal (not the black ceramic coated sleeve) type 1/2A NorVel and BigMig engines seemed to take quite some break-in, and adjustment of the user's approach, but I haven't heard that about the ceramic ones.
And, you did get a good price!