I just finished this project on my 80, so some of the details are relatively fresh in my mind. The biggest pain for me was all the various fittings and connections, and figuring out exactly what you need. I ended up with about $50 in extra brass that I don't need....
What's your plan for integrating into the fan belt/pulley?
1976 FJ40 - green and mostly stock
1996 FZJ80 - not so stock