I have used the same MSD 6T box without ANY issues since 1987. Mounted in the same place. My opinion is that vibration (as well as severe heat) is a detriment to (any type) of electical components. The 6T box is primarily marketed as a Circle Track product. Unlike the others it uses a separate rev limiter box and also has rubber isolators that it mounts on to reduce the amount of vibration it is exposed to. To date heat in this location has not been an issue. With my header setup there IS heat in this area.
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