Jim's castings are excellent, but I would suggest contacting him and getting one of his PDF catalogs if you are interested in purchasing any of the models based on a Johnny Lightning token.
I say this because only one of the models based on the Johnny Lightning tokens is exactly 1:160 scale (the '82 Camaro), and Jim has included the actual scale for the Johnny Lightning token based models in his catalog. And I will add, that none of the token based models are larger than 1:154 scale or smaller than 1:174 scale.
Carter
P.S. I am not sure if Jim made his own measurements and calculations to determine the scale, but they are in agreement with the measurements and calculations I made for the Johnny Lightning tokens several years ago.