...anything ranked 7 or higher has his stamp of approval.
5 or higher - means it's good enough to play.
As for Hucksters interpretation of the scale it's not the first time he's loused it up...
5 - well above average - not worth setting a day aside for
6 - very good course - worth a game in town, not necessarily a special trip to see
7 - Excellent - worth checking out if within 50-100 miles - soundly designed, interesting holes, good conditioning, and pretty setting, if not anything unique
8 - One of the very best courses in its region. Some drawbacks, but these will be clearly spelled out, and will make up for them with something really special to the generally excellent layout.
9 - Outstanding
10 - Nearly Perfect
Sounds like an 8 to me, if there are some drawbacks the setting and green complexes ensure it's an 8.
p.s. Plainfield may have been a 7 in 1987, it's not anymore.