Nice project, I see that you updated it from 2010 to 2019.
That's called dedication.
That old video showed some road under your feet, a full belly pan may resolve that condition while improving your Cd.
130 mph?
You are taking care of a great deal of lift by following the aero-template but I would feel better if there was a front chin splitter for some nose down force to help keep the car planted at high speed.
When you seal up the front grille, make sure it's air-tight, even a little air penetrating though has a habit of being noticeable.
I'm just saying this based on my S-10's blocked up air inlets, sometimes it needs to be resealed based on how the truck feels on the highway. I can tell when a gap has formed - not kidding.
S-10 photo album
S10 4x4 Pick Up by George Kachadoorian | Photobucket