I just had a sudden issue with my ls swapped 73 Camaro. I did a t56 swap and I drove it an hour without issues.Then I try to go to the liquor store and it dies 5 feet from my driveway. Eventually, I found that the pcm wasn't getting any power. I hooked up 12v fused hot wire and my fuel pump primed and it started up. So I try it again, and it pops the fuse. I toss in a new fuse and nothing, the fuse didn't even pop. I check the voltage and its getting power to the pcm. Did I fry the pcm? And I have a dyno tune on that pcm, would the tune transfer from a fried pcm to a new pcm?

Pretty confused here, any help is greatly appreciated!