I'm going for the original look with a central shaft (photo) which has 2 'T' plates brazed onto it. This part is attached to the base of a turkey pan with 2 pillar bearings. Each throttle is connected to the hole at the top of the 'T' plates with adjustable linkages. The throttle cable attaches to the (far end in the photo) 'T' plate, in the lower central hole.
The 'T' plate at the rear of the engine is the one closest in the photo and has a step bent into it, this allows the turkey pan to be shorter at the rear of the engine.
I'm waiting for the pillar bearings to arrive so I can set up the linkage system.
If you go to the website below you will see a photo of the system in figure 15.
Ford GT40 Restoration - The Motivation
Although it shows 2 shafts and 'T' plates, and 1 set of linkages, you can see the pillar bearings.
This setup also makes the throttle cable come off the engine in the middle of the IDA's.
Andy