I forgot to post these last week when I got all the A/C hardware back in place.
I also spent some time plastic welding the ABS plastic radiator shroud. The original equipment shrouds from these cars are extremely rare to find intact. The GM replacement part has a large circular notch cut in the bottom and a bracket hole in the top for an overflow tank bracket that the 70-72 cars do not have. I have seen mint shrouds go for some big bucks recently.
Here's the shroud as is, when I bought the car. It had a 1-1/2" circular hole cut in the top and three 3/4 holes in the side and bottom, all for mounting of the aftermarket electric fan:
And here is how it looks after the welding (and inhaling of melting ABS fumes)
and the finished A/C reinstall (minus the R12).
