Just changed my pickup coil on Saturday. Funny it was OK when I parked it last winter. It's just got to be the heat that is cooking the electronics.
I haven't killed a pickup coil yet, just 1½ modules. The ½ module is a pretty red Holley Annihilator, which is just starting to get cranky as the heat builds up.
Assuming that the circuit modifications & thermoswitch location cycle the rear blower on/off appropriately, the next two things I have in mind are modifying the airflow path to include the distributor instead of just the coil, and mounting a small external heat sink on the underside of the distributor (below the ignition module). I'm not certain how much it will help just yet, but some will be hopefully better than none.
...but those other mods won't come for a while yet. I have a vacuum leak to hunt down and mercilessly execute first.
Swapped in my spare EGR tube last night, which alleviated the problem only just slightly. The original tube feels like it has developed a crack two or three segments in from the end which connects to the EGR valve. Assuming that the connecting ends of the old tube are serviceable, I may have a go at fitting them to a braided steel line of appropriate diameter as my "ultimate" EGR tube.
There be still a significant vacuum leak however--I can hear it. A noticably out-of-place sucking noise, which fades & rises in concert with a wander in idle speed. The front manifold still glows, but not quite as brightly as previously. To be continued....
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