Look up the official toyota body repair manual, It has some pretty accurate measurements.
I've been looking around for a while, but haven't been able to find any reliable and accurate AE86 blueprints, particularly ones of the Trueno Kouki Notchback (2door) style. If anyone knows where there might be some online or have access to this information I would be grateful. The only one I was able to find that looked accurate was a Levin Zenki Notchback (2door).
Look up the official toyota body repair manual, It has some pretty accurate measurements.
There's no way to get these blueprints now. You probably need to wait for the event replay so we, owners, get to do RRs to get missing blueprints.