Fuel Gauge Problem???

[brandonh06]

I have an 1986 Mustang GT and i took a 1987 Mustang LX dash and put it into my car. I'm having serious problems getting my fuel gauge to work, if anyone has had this problem or know of someone who has I need ur help figuring it out...I would greatly appreciate it..

 

[ram360]

not sure if the 86 has the same fuel level sender as an 87+ car. Might be something to look into