I tried searching for the answer to this, but can't seem to find it. The instructions on page 27-2 indicate to dimple all of the rivet holes in the firewall, but I'm not sure if the upper forward fuse rib attach holes and the oil cooler box holes are also supposed to be dimpled. It seems like they should be, but I can't find instructions or a rivet pattern for those parts later in the instructions.
Seems like it would be much more difficult to dimple them later if they need it and I don't do it now.
Seems like it would be much more difficult to dimple them later if they need it and I don't do it now.