[Aerocoupe]

Looks like you will have to drill the strut towers and the firewall. I would strongly suggest you make a backing plate for the bolts going through the firewall. Drill the holes through the firewall and then put a piece of 1/4" plate behind the firewall and mark the holes and drill it out. This will keep it from cracking out tearing. That is the weak part with strut tower braces of this design. I have the MM strut tower brace and it bolts into the existing holes on the pinch point of the firewall which appears to be the best place to install one without mods. I am sure others may have a better solution to the 1/4" plate but it has worked on a couple of cars here locally.

Darren