I'm an Electrical Engineer for NASA/JPL.
Not exactly a Rocket Scientist, but I eat lunch with them.
This might help.
You got the air filter box off. That's half the battle.
Took me a while to figure out those rubber mounts.
The biggest challenge I had is once you "Release screw (1)"' which is actually a honkin' bolt, the alternator is still stuck.
"Screw (1)" goes through a tab on the block, then the alternator, then another tab on the block.
After you take the bolt out, the tabs are still squeezing the alternator, so it just rocks back and forth.
I had to go up from underneath with a big screwdriver and pry it out.