Rick, how are your fans wired? You might want to try temporarily connecting them directly to the battery, to see if their speed increases over how they’re connected now. A fan blowing a 25 amp fuse might be a sign of a bad connection or bad ground; either of which will cause your fan(s) to turn more slowly than they’re designed to.
If I were you, I’d call your block manufacturer and ask them what they consider to be the acceptable range of normal operating temps. Aluminum blocks grow a lot from cold to hot. If you’re running too hot, your bearing clearances may be getting too big, too. How’s your oil pressure at 220°F? For this reason, it’s very important for you to control the normal operating temp of your motor. You shouldn’t need a 20lb rad. cap to keep from boiling over, even in AZ.