Here's my understanding about the Indy cars, which of
coarse is not written in stone and subject to change
at any moment.
All three cars are the same casting with different
names on the chassis.
You should only find the Al Unser on the Indy Winner
card, but to save cost, Topper slipped P. Jones into
the blister even thou it's labeled Al Unser. You can
find all three indy cars on the challengers card. Also
it is said that you wont find a ruby colored Al Unser.
I've also read that all three cars may have came with
a plastic wing, but personally I believe at the moment
only the P. Jones did.
Finally I'm looking for a nice A.J. Foyt in blister,
so if anybody has one their willing sell, please
contact me.
Jim