Agree, neat car. I don't really care for the prominent nose on the Firebirds, but otherwise, it is a very cool in that color combo.
Yes, it's a Ford 3 speed trans. It is cast iron and if it were a 4 speed it would be a Muncie. The Saginaw plant burned in that time frame and ran out of 3 speed transmissions. I had a '69 GTO with the Ford 3 speed.
Does appear to be the HO Sprint...4 barrel intake with aftermarket Holley and dual exhaust.
I agree the ask is rather strong for a 6 but as clean as it appears and in that color, he might get close. Personally, I'd be in the 25-28k range, but I'm cheap...