Alternator started sparking

More electrical issues. Since my last post, I’ve fully unwrapped the wiring harness and found a mess. I had a power drop of .3 at the alternator and found that there were a few fused wires and burnt connections. I rewired all the bad/fused wiring I found, which was every wire in the middle bulkhead. The 8 prong connector under the dash, that has the ignition wiring had a fried terminal. When trying to remove the male end, the 8 prong connector cracked in a couple places, so I fully disassembled it and mated each side to each other and wrapped each connection in electric tape(temporary) and replaced the one faulty wire connection which was the dark blue ignition run wire. I was still having a drop of .3 at the alternator. I then ran a new blue ignition run wire that bypasses the bulkhead to test. Now, the MSD box light doesn’t come on and the engine won’t fire. I have direct connections to the positive and negative battery terminals from the box. I’ve gone through and cleaned up the bulkhead connections. At this point, I think I’m going to hardwire all the middle bulkhead wires and drill out a hole to feed them through. Or is it better to just get a whole new harness and fully rewire?!? I really don’t want to spend another $500. I’m lost. Lol. I’ve searched a bunch of threads here and watched enough YouTube videos to think I know what I’m doing, but before I start getting into more trouble, I thought I’d ask for another round of advice.