There seem to be so many conflicting reports on this sort of thing, the usual answer is check with the authoroties in your state and/or your engineer.
As the ae86 came out with a 4age then it would make sense to use the brakes off one of these cars (ie JDM spec as opposed to ADM), AFAIK they are a straight fit (pistons/calipers/mounting bracket).
This info has been repeated way too many times, use a search (and the old forums too)
Rob
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