Originally Posted by
Six_Shooter
My experience on a few vehicles where I've used remote mounted ICMs is that people WAY over think the heatsink issue. I've ran them with no heatsink at all, and hanging by one screw, to attaching it to a flat metal plate meant as mounting and not (really) for heatsinking, without any issues.
The stock location is one of the hottest spots in the engine bay, next to being physically inside the engine and they work reliably there for years.
I'm not saying that it's not a good idea to use a heatsink, but just don't over think it. A flat mounting plate of aluminum is plenty. Think of how little heatsinking there is when it's installed in the dizzy (in the hottest location it could be in the engine bay). It's a small flat plate. The stem of the dizzy will contribute a LITTLE bit, but will be hot from the engine itself.