Fusible link or not?

I can't answer directly but maybe can help you solve the dilema.
Fusible links came into use mostly to protect against the battery being accidently grounded.
This usually took just one link in a traditional wiring strategy.
Fusible Links in Charging Systems with Ammeter

When portions of the power circuit needed larger wires, then two or more fusible links were used. A large one to protect the larger wires, and then a second one to protect the smaller wires. Chrysler didn't seem to worry about protecting 18 gage wires with fusible links. They probably figured they turn to smoke in an instant if shorted to ground.

So whether another link may be needed in your layout depends on the wiring layout. My personal view is to use a layout that minimizes the number of the fusible links. Each link or fuse is resistance to higher current flows, and every junction is a potential resistance area. (When they are in the battery charge line, they usually have plenty of time to cool off in between charging. )

If you want to convert to fuses, the approach here seems reasonable. It's based on the changes made by Chrysler to the 1980s front wheel drive cars.
Electrical Issues - MiniMopar Resources