front lip / air deflector / chin spoiler whatever you want to call it.
got mine from LMC Truck Part# 39-7429 $39
box it came in
more reference #'s
fasteners on the ends
the rest of that edge is a slot or flange that slides/pinches over the lower bumper cover edge
this woulda been easier to do before i lowered it! haha
anyways, i used nuts and bolts on the farthest edges
then i used self-tappers to get the rest of it to pull as close to the front seams as i could
this thing'll cut your ankles off now!
i stole a page from @RedRocket
playbook and made sure my outer edges were flush and mounted well, then worried about the rest of the curve for better fitment.
Red's build thread is a great resource of info and inspiration. So, thanks for that. and as always thanks to everyone's ideas and input