I just replaced my ignition module for the 4th time in about 18 months. 350 crate motor MSD Street Fire HEI distributor. The first few times it caught me in a parking lot Monday evening I pulled away from a red light and it died. (luckily I coasted off the busy road into somebody's driveway) since I have been thru this before I checked for spark and of coarse there was none. My son came and got me, bought a new module and it fired right up. I understand that heat kills these things but 4 in that short amount time? I have owned a 69 Camaro ( put an HEI dist in it) and a 79 Camaro with an HEI and never had this problem. (I am putting the di-electric grease under each one each time.) Any ideas or is this really that common?