For a project I am working on, I got hold of a fuel tank from an 82 diesel blazer, and am wondering what gauge wire I should use to splice to the sending unit?

I'm assuming the size would affect resistance, and therefore gauge readings? Looks like it's 16 or 18 gauge?

Also, the sender has 3 wires coming out of it - is the largest one for the gauge?

They all appear to be white.

Thanks in advance.

Joe.