The car was set up very professionally for a privateer, and even had bearing spacers in the front. For this reason, I'm hesitant to discount their usefulness. Any ideas?
This info is from Robert Lodewyk (sixteengrandsedan#56)...
"The car has rear brake rotors mounted on the front. The offset is slightly different, about 1/16" or more to the inside.
If you put the rears on the front, the rotor surface is closer to that large bolt on the top of the spindle that mounts the
caliper bracket. My #56 had a rear on the front with a spacer between the hub surface and the inside of the rotor."