Cool, that's all good info. Thanks. I did more searching, didn't realize the 5 speed trans has two overdriven gears. Then it occured to me that going from 23" stock tires to 27" would be about a 500 RPM drop, about the same as shifting from 5th to 4th gear. (I'm sure lots of other people have already figured this out ).
Thanks again for all the help.
Best,
Andy