Have No Power help!

4.5 ohms resistance repeating is most likely the resistance in your meter and its leads. The fusible link has a service disconnect at the bulhead connector but you can delete it if you want to by a fusible link from a part store and install it with crimped or soldered connectors. Otherwise you would need the OEM type fusible link that is available at YearOne.com .
there is also info with pics at madelectrical.com which detail drilling through the bulkhead connector and wiring straight through deleting those connectors too.