I highly recommend one of those Blue Seas fuse blocks. There are several different styles to choose from (6 or 12 circuits, with or without negative buss), so look around before buying one. You'll need to re-terminate the wires to ring terminals, but that's not a bad thing from the looks of the wiring.
It looks like you could get away with the 6 circuit with integrated negative buss, for an apples-apples swap. I chose the 12 circuit with integrated negative buss, and managed to fill all the circuits......