You might find out what size orifice was used.
A lot of mechanics are not familiar with the new changes that came out with change 1B of AC43.13 released in late 2001.
The "bible" now calls for a 0.060 orifice for our Lycomings with a 5.125 inch cylinder bore. The old standard was a 0.040 orifice, and a lot of mechanics are still using their old equipment.
With the new, bigger orifice, I have found that readings on my Tiger are now in the 78/80 range.... may be less accurate, but that's the way the FAA wants us to do it. I personally would be very concerned with 60/80 with the larger orifice... even though the FAA says it may be OK
Details on page 8 of this AC section...
http://www.airweb.faa.gov/Regulatory_and_Guidance_Library/rgAdvisoryCircular.nsf/0/99c827db9baac81b86256b4500596c4e/$FILE/Chapter%2008.pdf
Anyone know if Lycoming has a recent Service Bulletin that says anything different?
Note that Continental has published a different procedure and check items for their engines.
gil in Tucson