My '69 32 (deck-stepped mast, maybe like yours?) had the mast wiring led along the thick plywood beam that runs athwartships and holds up the mast. Your 35 may have this too - you probably don't even think about it. The wiring penetrated a rough hole drilled through that beam, through the deck, a stainless halyard organizer, and mast foot plate, and went up the mast. Some of the port side cabin lighting also ran along that beam, having come from the fuse panel on the starboard side.
It worked, I guess, for over 40 years but threading a lot of wire through a lot of inaccessible hardware under the foot of the mast was a terrible design. Water inevitably finds its was inside the mast and drains down that rough hole, eventually screwing up the wiring and saturating and rotting that beam. There was no access to that wiring and the cabin light wire failed 20 years ago, requiring a lot of troubleshooting and eventually a replacement wire run up the port side, which was how it should have been done in the first place.
When I embarked on a substantial project digging out and replacing that beam two years ago, I re-ran the mast wiring so it exits the deck near the mast, then has a connection to the mast which is easily accessible from the deck, then penetrates the mast a few inches above the deck. If the mast lights go out now, at least you can troubleshoot where the problem lies.
I removed all mast electronics in this process. Cup-style anemometer: nifty gadget, but absolutely not worth the complexity of the moving, delicate, hard-to-replace parts, nor the wiring up the mast. Electronic wind direction: a Windex is lighter, cheaper, more sensitive, and uncomplicated. Mast antenna: my boat came to me with a transom-mounted antenna which has always been more than adequate and is exceptionally easy to replace, so I did not add this. So the only things going up the mast now are an LED Windex light (top of mast), an LED steaming light (3/4 up the mast), and two spreader lights (1/3 up the mast), which are the traditional tractor-style incandescent bulbs that are so inexpensive, so infrequently used, and so easy to replace that I couldn't justify replacing with LEDs.
Radar: SO MUCH ELECTRICITY. Would involve a complete revamping of the power and wiring in the boat and on the mast. I just don't use the boat in a way that would make this worthwhile.
Speedometer: Taken out years ago, not worth the hole in the boat. Now that there's a GPS in every pocket and an iPad with navigational software on board, the value of the mechanical, imprecise speed-through-the-water is almost zero. Never have to worry about cleaning the barnacles off of that dumb speed wheel again, or the through-hull leaking.