  We create isochrones of M67 using the Yale Rotating Stellar Evolution Code.
In addition to metallicity, parameters that are traditionally held fixed, such
as the mixing length parameter and initial helium abundance, also vary. The
amount of convective overshoot is also changed in different sets of isochrones.
Models are constructed both with and without diffusion. From the resulting
isochrones that fit the cluster, the age range is between 3.6 and 4.8 Gyr and
the distance is between 755 and 868 pc. We also confirm Michaud et al. (2004)
claim that M67 can be fit without overshoot if diffusion is included.
