Installed oil cooler onto firewall. It's possible to fish the cooler through the side of the engine mount tubes, but just barely. This is good news, because if I could only go through the center of the mount, It would mean that you'd have to pull the engine if you ever needed to get the cooler off, which would be just a ridiculously bad system design.

As it is, I'll have to loosen this up again in order to get the outboard AN fitting installed, but I'll still consider that a win.