Reply to "About a cable and tanks..."

FWIW, surge and overflow tanks made during the Ford era were nickel-plated inside and out at the factory, then sprayed flat black. If you polish them, they look custom. Sadly, the factory guys should have known any plating is not a continuous coating but is made of little flat crystals lying on top of each other. Over time, water can still wormhole its way past the crystals to the mild steel underneath. After all, bumpers rust anywhere if you don't take care of them. So as a rust-preventative, plating the tanks didn't work very well.
And in relocating the temp sender, the block has a pipe plug in it that fits the tank hole, so all you do is swap the pieces. The factory wire to the sender is long enough to fit in either location. So this is really a 10-minute swap (except for draining the water down to the block hole and refilling) and only needs some teflon pipe tape on the threads.