Just went through the same problem with Gramma's 75 Firebird on the sending unit. (74 and 75 Birds and Camaros used the same sender). Go here and you'll see the correct replacement to use if your car has the fuel supply lines running up the driver's side and the vent lines running up the passenger side:
https://www.yenko.net/ubbthreads/ubbt...pics/449019/31