I don't know if anyone's brought this up, but comparisons of the cockpit layout in the game and in an actual F-104 suggests it might be flyable.
Actual F-104 cockpit
Looks like the placement of the altimeter and artificial horizon and possibly the design of the altimeter might be goofed (could also depend on specific variant of the aircraft, too), but they're otherwise identical.
Edit: Sorry about the giant size of the AC7 screenshots. Don't know to reduce them.