When did your ignition module fail?

I ran my HEI module for 8 years, 3 of which I was daily commuting. Then when I swapped from a slant6 to a 360 somewhere along the way I lost that module (no idea how). I put a new one on and bought a spare on Amazon to keep in the glovebox since they're cheap. I'm glad I did. That new HEI module died after just a few weeks of use in a Target parking lot!
Now I carry 2 spares in the glovebox and they're both different brands :)