I have the CH28 (Dual Quad) I have the MSD coil. I was forced to mount it upright because of a leakage issue with the Blaster II coils. I got a Mr Gasket special with the chrome brackets and the sleeve. Both ears are mounted on the valley pan hold down plates...In direct line with the fan blowing on it....add insult to injury, its even stuffed under a Six-Pack type air cleaner...It might get a little hot in its current position....I didn't have an alternative. I dont want a coil wire running to the fender or the firewall.