Looking at the gauge of wires they used a 30 amp fuse should work. If it presents an issue I can switch to drop in 30 amp circuit breakers.

There are three fusible links going into the fuse block. I planned on replacing each of them with a fused lead. If I put the blower motor on a relay for high speed it will take a big load off the fuse block. They are known to melt fuses and fuse blocks. My headlamps are already on relays.