Alright lets get some Roadster input.... I am an Admin over on a Mustang site... and the range of aftermarket parts and price points are MUCH better than available for our 370s.
I like the idea of a front lip for the front but the $700-$1,000 ones that I see pushed on here (with Japanese install instructions lol) are not for me.
I will do some better measurements soon - but the chin spoiler off an 03/04 Mach 1 Mustang may fit the 370... they can be had for a smashing $69 and are a slick and easy install. They are somewhat pliable so if you touch a curb with it it won't crack (unlike the $1,000 versions).
I photoshopped one onto my Roadster to get a rough idea...
Before...
After...
What do you think of the look/idea? Any other options you have come across?