86 escort ecu upgrade

i was wondering which ecu would make this car gain a little horsepower. i was told one out of a xr4ti would make a difference my question is what year ecu would work considering my car is carburated and i figured it would make a difference i choose the wrong one. i can get a ecu from a xr4ti from around me for 50$ but the xr4ti is a 87.

You got a carb and your looking for a chip for an ancient car. LMAO.