At least the floors are still in it.

Steve, if you're going to run a fuse block, the handiest place is right at your terminal block. Problem is, when one blows, and they will, it's at the back of the engine (Where YOUR dizzy is). Fuses are much more tempermental and unforgiving than CB's. In other words, they blow much easier than a CB trips. Safer? Well, kinda, yes from an electrical standpoint, but on a boat? I'm not so sure. The best place would be at the helm. But that's a lot of wiring.
I tested both of my breakers, yeah, there's two of them, in series, and they're fine. Same problem tho, when they pop, they're on the back of the boat with the hour meter. I'm rethinking their location only because when it happens, and it will, it will be at speed and the boat will shut down, and consequently, when my wake half floods the back of the boat, (Again), NOW i got a bigger problem. Wet breakers and a boat half full of water with no power. I am even complicating this with an Oil Pressure cutoff. I almost think I'm TRYING to sink this thing!

But the engine is valuable to me
A fuse block is a great idea, as they almost never fail, but they do blow far more often. (Ever notice even NEW cars come with spares inside the fusebox cover? Go figure!)
I would go with what you're comfortable with. Personally, my preference was to run overguage wires (which most manufacturers apparently already did, so that was handled for me) for their respective purposes AND run two breakers in series. If one fails, the other won't. Laws of averages. Nothing wrong with running two in series.
Ray