Did you notice which way to radiator tubes are facing??? I said the front "pushers" weren't working, so I removed one (and only one, leaving the A/C condensor fan), and started working on these (for the rear).

The metal is a shroud from the rear with the fans there. Basic geometry for circles and rectangles proves that without a shroud, you are giving up over half the working surface area of the radiator.

Nice try though!