I read Smith and Fred Pugh's book on brakes eons ago so you're more familiar than me right now.
Overall, I'd guess your plan is sound. Here's what concerns me; drag and weight.
Downforce is only effective when air feeding the downforce devices is controlled and 'aimed' at them. Not sure that will happen here as you're trying to evacuate and channel air for cooling improvements. Adding a chin might compound the problem. I just feel that all the blocking panels might cause higher drag. No empirical experience to back my guess.
After you solve all this nose stuff you got the huge drag-maker, the
cockpit. Think maybe a hard tonneau.
Which leads to my other concern; weight. Sure, the tin you add in the nose may only be 10 pounds-worth but you'll have substantial roll protection weight when done too. You were super weight conscious with block, trans and all bits. Maybe carbonfiber for all your ducting / fairing and tonneau??
OK how about a crew hat instead of shirt??
