Here's what it looks like with everything removed and backdated.
You have to remove the blower, and both block off plates next to the fan and replace them with parts from an older 911. There are some 930 parts that will work too. If you search there are plenty of threads that outline all the parts you'll need.
I can roast my toes on the coldest day, but you have to keep the RPMs up without the blower there. In the past I had half backdated it. I left the blower but removed the hose over the top of the fan. This gave me forced air from the blower to the drivers side of the car, and heat from the engine fan only to the passengers side. It was a good compromise of looks with forced heat. Since I don't drive it in the winter at all, I just yanked it all out for simplicity. So much easier to work on the engine now.