It's possible the casting number could point you to a certain vehicle application which may give you a ballpark idea. But specifically, no.
Camel hump heads came with a variety of combustion chamber sizes and I don't know that all of the larger chambered ones had 2.02"s. I would also suggest that the intake/exhaust port volume was larger in a number of models .
I have heard it said that care should be taken when enlarging for a bigger valve spring on the end that is near the water passage.