73 / 318 engine. Bone stock. The previous owner installed an inline 30 amp fuse where the fusible link typically goes. I noticed the car would lose all power at times. When it did, if I removed the fuse and reinstalled it. The car would power back up. But, it got to the point it would blow immediately. I replaced the inline fuse with a slightly heavier gauge one and installed a 40 amp fuse. It powers up every time. But, blows when I attempt to turn ignition key off when attempting to start it. I haven’t done anything to diagnose it. Because I don’t know where to start looking. I looked under the hood at most wiring and nothing appears to be a problem ?
