Neutral Safety switch with a twist.

[Missourimark]

My 69 long horn has a wiring short I can’t figure out. First when I bought this truck a couple months ago I started cleaning up the wiring, 50 years of hacking and adding accessories. I found out I didn’t have a neutral safety. They had bypassed it with a wire from the ignition to the starter. So I hooked it up the correct way and found a no start issue as they probably did then they just ran a wire to remedy the problem. When wired correctly it has a dead short , like dim the dome light dead short. Run a jumper no issue starts fine. So easy enough replace the neutral switch which I did, same issue no start , dead short again. Run a jumper, starts fine. What am I missing ?