NO WING!!! OMG, NO WING!! Please, anything other than that...please?? LOL.
Okay, my rational thoughts, now. Just keep in mind, I'm not offering any mechanical suggestions here...I'll leave that to the people who know what they are talking about.
I'm finding I'm not really liking the Cougar or MKIV, but between the 2, I'd go with the MKIV. I like the stock tail lights myself, are there maybe some other options available for you, or that you would be willing to look into?
The splitter looks good, so long as it goes with the color scheme of the car, obviously (see below image). I'm very picky. I like to see cars stay along the original lines...I've found a few that just made me cream myself, thought I'd post them here for you.
**I'm trying to find a replacement for my first car, which was a 1974 Maverick. I miss it something fierce.....although we may have just found one for sale about 60 miles from here, yay!!**