No Power to Car 1975 Cutlass 442

I would trace out the battery wires. Pay attention to the accessory hot wire and check for damage or corrosion.

Fuseable again,there should be two connected to pos terminal on starter. Inspect wiring behing pass manifold as it can come into contact and short popping fuseable link. Footnote test wiring at starter to verify power from starter to wiring to ignition. The fusable can pop and the outside of wiring will look on point

I think you're right about about the fusible link. I'm having trouble following the wires from the battery because it goes under the motor. Where about would the fusible link be located?