wait...let me get this straight. You tried using a 10 amp, 20 amp, and a 40 amp fuse to hold current against a MINIMUM 70 amp alternator?
When I replaced the ungodly fusible link block in my buddy's gsl-se I used a FC fuse block and bracket. used the FC fuse pattern and matched everything up nice and tidy. NEVER once blew a main fuse (which is the alt fuse), and we bolted up a S4 fc alternator and used the stock 80amp fuse to keep the power in check.
Slightly shitty pic of it installed, and sadly the only picture of the setup, but it mounts to one stock bolt hole, then you may have to drill and rivet the other hole, or look into a re-speed mounting bracket.