Main wiring harness from scrath... a few questions

[the head]

for the headlights since they may not travel up and down at the same speed you may want to just use two (1 up 1 down) relays and wire it to a momentary DPDT switch which you can hold until both lights raise/lower. I have a 66 corvette that is wired like this from the factory and the system works very well and is much easier than a timed relay or limit switch configuration

For the alternator I am unsure if the alt can be hooked up in the method you are describing since it is not a self-exciting (see single wire) alternator a lot of hot rod shops sell conversion kits to make alternators self exciting but IDK how to wire one on a nissan alternator. If you could get the conversion to work than yes your alternator could be wired that way. also you dont want a fuse on the alt to batt connection.

these are just a few thoughts for ya good luck with your project!