I picked up a Tru-Trak pictoral pilot. They make brackets to bolt it right into the wing. They have brackets for either wing. I had a Century I in my Cherkee 140, and it was really nice to have it to handle the directional chores on a longer trip. My Mooney had a Century IIB which never really worked right, so I didn't use it. Really missed having an autopilot.
I ran some of Van's conduit through the ribs to the tips after my top wing skins were riveted on. I drilled the ribs prior to installing them on the wing spar. I followed Dan C. 's original before reading through to where he advised against that location due to difficulty because of where they need to enter the fuse. So my conduit now enters the wing root in the location Van's recommends, low on the rib aft of the 1st lightening hole, and after the wing walk ribs transitions to the upper corner where rib meets spar. The conduit is well secured and clear of the aileron control. I used the "tie a string to a cotton ball" method to get strings to pull wires through. Man, does that work well! It was so easy I blew 5 into each wing, lol.
I figure when it's time I can make a cut into the conduit very close to where the auto pilot is to pull wires. The only other thing I see in the wings is the landing lights, Duckworks, both wings, and recognition lights. Strictly VFR for me.
I did buy my fuel pick ups from Vans, 1 ea std & flop tube. Std. float fuel senders. Stainless steel pitot tube from Vans. Used the aluminum tube & fittings suppplied wih the kit. Van's pitot tube isn't the most attractive or fancy. But it's simple, cheap, and proven. One of the last things I want to deal with when flying off hours is any inaccuracy in the pitot system. I'm VFR only anyway.