Yes, talking about the main feed to fuseblock from starter relay.

Haven't made the fuseblock mods yet, but I did inspect the terminals, and they look ok. Amps guage too. I'm still excited about making the changes, but really want to find the real problem first.

So far, all I have found for sure, is the main circuit has to be good for MORE than 30A, and the wiper motor pulls 2A MORE on low.

Right now, this is my thought:

Probably every bulb in the car pulls more power than the original, so that the lighting circuit is probably 10% or more over factory specs. Thus, the fusible link has been at capacity for a long time. Thermal cycling probably has reduced the full load capacity of the fusible link, so it was doomed to fail. Also, just judging from the guage of the link, I'm guessing it was undersized from factory. Considering this car is AC, power Windows, rear defrost blower, it seems the fusible link was doomed to fail, simply undersized.