The ign module will work or it will not , does sound like you have a fuel problem , you may have to put a tee in the fuel line between the pump and carb and route the gauge inside to watch it when you drive to figure if it's the carb or fuel supply, drive until the problem shows up , you should have 4 to 6 pounds of pressure, if you do its in the carb , if not it's the supply, since you do have a pinto tank remove the sender , the strainer is at the end of it ,