Auto Meter Fuel Gauge in 69 Charger

You may find it is not accurate, as mentioned, the sender is NOT linear, meaning, 1/2 tank is NOT halfway in between the max and min.

HOWEVER there is a little toy called "meter match." There are also others, china, ebay, etc, do some research.

https://www.tanksinc.com/index.cfm/page/ptype=product/product_id=748/mode=prod/prd748.htm
The HUGE issue is that nobody seems to make and sell a "like OEM" sender. Evidently the taper or curve of the resistance of the replacement senders is WAY off