56markII: You will have better luck if you find another ^V KS sending unit from another car and fine tuning it to work with your stock gauge. As has been pointed out in many threads, KS gauges and sending units DO NOT operate on the Ohms Law principles.
Here's one for sale that could be made to work. Keep an eye on it.
It will never sell for the asking price. Get contact info. and after the auction, make an offer.
https://www.ebay.com/itm/1953-1954-1...8AAOSwGBpeOLvj