Got rid of my '69 Mach I with shock towers cut back, so I don't currently have anything short of a late model Fox body. That gives me an idea---
On the AWACS dome, when I was still active duty, the aircraft were restricted to a certain MPH because of stresses caused by the domes to the aircraft structure. The aerodynamics have improved, but I think if you were to have access to the flight manuals, there is still a speed limit on the airframe.
Joe-JDC