Well I never did figure out where that drain for the engine block was so I just went ahead and removed the radiator inlet and outlet hoses - that released a cup or so of fluid that was still in the hoses.
Then the radiator came out by removing the 2 bolts top left and right - another couple of cups of coolant were still sitting in the radiator and that came out as I tilted the radiator towards the lower hose connector as I pulled it put. I also removed the coolant overflow tank - which was seriously lacking in contents - well below the Min level ... well I guess I won't need to worry about that any more :).
Next up the hood came off - should have got a picture of that as my 10 (nearly 11) year old daughter helped with that, steadying one side of the hood while I unbolted the other.
Last up for the evening (more 'daddy' stuff to attend to) was removing the A/C compressor. That involved disconnecting the electric cable which I assume carries the signal for the compressor's clutch to engage. I tried to disconnect it at the compressor (the blue connector on the picture below) before I realized it needed to disconnect it at the connector by the driver side headlight (I labeled those connections to I can match them up when the compressor goes back in).
Then I disconnected the freon lines (Midas did their job - no freon in there - you can see them loose in the picture above) and 4 bolts later the compressor was out.
I need to remember to put some plastic wrap over the freon lines to stop dirt getting in them. Ditto the holes in the compressor that they connect to.