I recently installed a MSD HEI Module in My 87 Monte SS with the orginal 305 HO. The engine has been changed to non computer controlled before I purchased it, and is suppose to have a accel hei coil in it, although there are no marking that say it is a accel part. Since I installed the module. after I have driven it for 20 or so miles the motor acts as if it is running out of fuel, I have checked this and it is not a fuel problem, if the vehicle sets for a while it runs fine until it is driven for a while again, I can keep it running by easying up on the gas. I have advanced the timing some and it helped a little but the problem is still there. I read some where that the module can overheat a stock coil, sould this be my problem, if it is in fact a stock coil instead of a accel, or is the module bad?