I decided to use firewall penetration shields for the engine control cables, as well as the large and small wire cables, based on a suggestion from Kelley Babin. I used the Van's IO-540 cable kit, but the throttle cable, which was 47.5 inch in length, is too short, especially in my case, where I want the panel to be able to tilt forward. I ended up ordering a 56 inch throttle cable from Cablecraft, which should do the trick.
