I don't know the specific differences between DA's and C.H. Ignitions' Electronic Ignition Modules, but FWIW C.H. Ignitions seems to be more concerned about vibration than cooling. Here's an excerpt from the instructions that came with the C.H. Ignitions unit packed with my Taurus TS-52...

1. Wrap the ignition module in foam, just as you do a receiver. We usually put the module in a plastic baggie before wrapping in foam. Protect from vibration. I have been asked if it is OK to mount the ignition module on the front of the firewall ... beside or below the engine. This is fine but you do need to protect the module from fuel and vibration. I put a couple of cup hooks in the firewall and then place a 1/2" thick piece of foam under the module. The unit is held to the firewall by rubber bands ... simple but effective. Our big engines shake a lot. You MUST protect, the module. Please don’t use Super Glue or RTV to glue the module solid to the airframe.

Hope this helps.