Trying to install my new export brace on my 69 Mach1, and although the holes at the firewall look to line up, the shock towers aren't even close. Looks like if I took 1/2" off the back edge of the brace by the firewall to shift the brace closer to the firewall all the holes for the shock towers would line up, but I'd need to redrill new holes. My other 69 lined right up. What gives? Any advice guys? Thanks in advance.
If you have the high-quality Drake brace, then the car is sagged. I've seen this many times, on cars that have never been hit, no rust in the rails.
Remove the upper shock brackets and factory braces.
Loosen all the fender bolts on the top of the fender.
Install the brace by very loosely connecting the bolts attaching the brace to the firewall pinchweld.
Determine which side of the car is farthest "off" at the shock tower, and start with that side.
Put a floor jack under the front frame rail extension, below the front edge of the front seat.
Raise the car, until the tower aligns with the brace, and install the nuts. Often the front tire will be off the ground. Sometimes even the rear tire. A few times I needed a Port A Power across the engine compartment.
Repeat on the other side.
Tighten the center brace bolts.
Tighten the fender bolts.