Also today I added a pusher 16" fan, mounted to the condenser. Also a Spal from Summit. (Be Cool part 75059). I had to remove and relocate the horns to make way for the fan. A 14" fan would have been a better choice, as it hangs over top and bottom a little. I don't understand why there was not a fan here in the first place.
I used a simple relay to activate the fan anytime the compressor turns on.