[DAVID GAGNARD]

Same here; on my 65 fastback the MSD box is under the hood and gets about the same temperature you have described,been running the same box close to 10 years now, so far, so good.....

On my 65 Mustang road race car, the MSD box is mounted on the inside of the passenger footwell, directly under the cool air vent, so it gets fresh outside air blown on it constantly,yet is still gets as hot as the one mounted on my street car, that box has been in the race car for 2 years now, so far, so good..........

I guess they just run hot!!!!!!!!!!!!!

David