sub'd, i had same issue last time i was at the track. bleed brakes while the car was off last weekend and did nothing, even though alot of air came out of the front left side caliper. will try to bleed again with with car on. i also have a replacement master cylinder on the way.
It opens and closes fine without rubbing. The passenger gap is a little big but Mustang fitment is not the best. I've put two different oem trunks on this car and they both fit different. #shrug