When I was up visiting ERA last year Doug told me that they had found that the key to preventing failures with the 6AL unit was to always use the noise reduction capacitor close to the MSD box (and to put them over the passenger’s feet to isolate them from the heat). Without the capacitor, even a “jump start” had the potential to blow the unit. Mounting above the passenger’s feet also made it convenient to put my adjustable rev-limiter in the back of the glove box. Here are a couple of shots:
