engine dying due to electric fan

The only real concern is where the wire connected to the 30 terminal is attached.

The charging system wiring is marginal at best. What I would do is install something like this to make sure the alternator power is getting to the fan, bypassing most of the bulkhead and dash assembly. There is no perfect place to pull power on mopars in all key states. Have to improve what's there to make it tolerable. :)

[FOR SALE] - Charging System Bulkhead Wire Around

You are going to tax the bulkhead with the fan draw. That will create heat in a connection that was crappy from the beginning.

I've been doing fixes and making items that keep our mopars from burning up for a long time. Glad to help.