When in doubt, always go with a fuse rated lower. That way, you blow a fuse way before you blow an amp!!! I'm not sure how many amps the fuse under my hood is but I know that 70 or 80 amps in the dist box sounds way too high! How many power lines are coming out of your dist block? I have 2 amps being powered and each one has an oversized 20 amp fuse. Also, amps often blow up without anything happening to those mini fuses in them so dont rely on them to protect your system!
