If you want a GOOD module find a Ford Motorcraft OEM module. Many parts stores have testing machines for igntion modules. When you mount your module use spacers to hold it 1/4" off the mounting surface. This will allow cooling air to get to the bottom of the module. Cary the parts store module as a spare. I run an OEM module now and I haven't had to change it for years. The parts store modules would run a year at best.