Full Re-Wiring Job - Help, Ideas & Sources needed.

Good info in the above posts. Considering where you are, ordering from the US may not make sense if you can find same things locally.

The point about General Purpose automotive wire is important. That insulation is not for engine compartments. The -XL wires are for higher temperature and oil/gasoline environments. Marine grade wire is also pretty good.

Because it is a Resto-mod, this may change things from stock. The design of your new wiring harness must consider the modifications. If there is new equipment, additions to the stock design may or may not work well or safely depending on how it is done and what the equipment. I like the stock design, but it is not always appropriate. There are situations where a different approach will work better and safer.