Far right hand lower corner...around the heat wrapping--there it is, the heat riser for the choke ! Years ago when I swore that the carb was 'rotated' (180' from the way Ford installed it...) and the convincing proof was that the heat riser for the choke was on the left header---but Denis insisted that in fact, he'd seen the riser on the right header....
...and of course, I still didn't believe him...but a few weeks ago he sent me a pic. And now in this car, maybe a clue that these were in fact used for the fabled 289 Hi-po...
And lesson learned--never doubt Denis