Brief Description: Fit and drill the upper firewall.
Fit and drilled the upper firewall. Most of the pilot holes in the strap were set on top of the flutes of the firewall flange and they had to be modified. In order to get the strap, the filler box and the Southco fasteners installed almost all of the flutes had to be modified. Small changes distort the shape of the upper firewall and it is a very tedious process to get it to fit properly.
