why cant we use B or E front disc?

Jimcbmx45 said
I have 75 sport spindles and I put them on with the calipers toward the back of the car. I've seen some guys put them on toward the front is there a difference?

from the factory they were on the front. but you can put them in the rear with no issues.. on the rear they won't interfere with the 67-72 sway bar.