70 dart 470 ci drag car build.

I know how the marketing dept came up with the .050 numbers for the MP performance grinds.
The problem is……. When I’ve measured them…… the numbers don’t correlate to the .85 figure.

A question I can’t answer is……… I’m pretty sure MP had that series of cams ground from a few different suppliers thru the years.
Were they all the same from different suppliers?