[Streetwize]

Well, for Drag racing having the MSD behind the firewall is ok, but it's really more important to have at least some small amount of air circulating over the MSD Box to keep the unit cool, it's almost always best to have them in the front of the radiator or on a Cobra on the inner fenderwell in the stream of the air extractors is a pretty good place; But if you have some fresh air ducting over it in the interior it's fine. I believe even the cup cars will route a small portion of the cowl induction air over the MSD's. The heat sink fins on the electronic unit are there for a reason, after all.