How to repair a 62 Fuel sending unit in my lancer

First off,this is not the same unit.Now its a matter of trying to mix and match the parts to build one good unit.Dissassemble the old unit and try not to brake any thing.On the new unit you will need to extend the pick up tube,and all so replace the float rod from the old unit and use the new float.Check the resistance of the old unit when its up and record it,and when its down.Do the same to the new one,so you can see if the two units resistance both go down in value and up in value the same way.Units either go down in value say from 90 ohms to zero,or go from 0-90ohms.You need to make sure of the guage and witch way it works to match it.With some work you can do it,Mrmopartech