Here are the roughed out dual plenum intakes; The snouts will be refined but I must say the aluminum welding on the box is aircraft quality.
I've also removed the side vent and am working on an appropriate duct.
Note the space now between the carbs for cooling air flow. The Plenum tops can quickly come off to allow easy DIY tweaking.
It looks like the new ones will fit much better than the Jalpa boxes (for sale, by the way)
I was going to paint them black or red, but I may just leave them aluminum...
I have no idea if this will affect the sound.