Remember the 97 (Like my truck) with the premium package 10" brakes (11" drum) came with 15" rims stock..

the real question the rim it self and rather the inside shape/design will fit the drum. as long as its not some dumb design id hope it would.

But yeah i had/have the same question about the procomp rims too.. wish they had some standard to know on aftermarket rims the inside min. diam's or something to show you.

Guess they just dont care.