Sorry for the slow responses. I've been helping my neighbors load up for the big move to Idaho. Two full days of loading, and we still have another day - day and a half. lol
On the fuel filler hose. Just search around through the stuff on Amazon.com. You may find the part cheaper elsewhere, but this is a pretty good listing of different hoses.
https://www.amazon.com/s?ie=UTF8&page=1 ... ler%20hose
On the O2 sensor. If at all possible, try and stay about 18" away from where the exhaust manifold and head join together. That is optimum distance.
The O2 sensor just needs to face up 10* or more from parallel with the floor.
If you run into issues figuring this out, you can either get a band clamp bung (
https://www.summitracing.com/parts/sum-690130/overview/) or you can do what I do, and duct tape a 3" long 1/2" socket extension to the exhaust pipe, to get an idea. Just make sure the pipe is cold... lol
This will give you a good idea on placement around linkages, and how to run the harness.
From our texts, it sounds like you've got a good handle on the electrical.
Keep up the great work. I'm looking forward to a viddy of you starting it, with an ear to ear grin.