Once all the measurements/cut marks are made on the firewall,
the cutoff wheel goes to work.6
TECH SMOOTH OPERATION
After careful cutting and trimming, this is the end result. This
is also much easier to do before the dash is installed in the car.7
The new recessed smoothie firewall is set in place temporarily
so the final measurements and marks can be made to trim it to fit
precisely, both the new firewall itself and the remaining part of
the original firewall. To keep the panel straight during welding,
two pieces of square tube steel are tacked to the firewall.8
The cutoff wheel goes back to work doing the final trimming
on the remaining OE firewall section.9