Yuck, all it reminds me of is ricer body kits. I'm just not a fan lol

Lose them. You're changing most of it anyhow so it'll be easy.
Your car is a bright color so I'd take the time to fill the holes in the rockers. If it was dark I'd say screw it but I think it'll be too noticeable not to.
Worst case pop them off and see how it looks from a distance. If you can live with it great.
The rear bumper on my Camaro was off an rs car and still has the holes but you don't see it cause it's black ;)

If you're that worried about keeping the holes so you can go back just paint a bunch of flat headed push clips orange and stick them in the holes lol.
Will look good enough until you're right up on it.

Its camera angle. From the side of the car they won't flow with that look.

I kind of like those kits, they're not too ricey and help keep the car from looking too bland. But with some nice wheels and keeping that spoiler you could pull it off without them. Without the GFX the hood may seem like overkill though, unless you were already thinking about changing that too?

i think he mentioned an ss hood in one of his posts i deleted..... haha

yeah i have an SS hood for it, cant stand the hood thats on the car now. cant see driving and it doesnt flow with the body lines

Yeah I think it would look good as an SS without the body kit. I really like black wheels on a hugger car though, are you set on chrome?

i love the chrome slp ss wheels. i do want to get another set of wheels, im thinking these:

i think its hard to find a color other than black to accent these cars because the entire roof is black and on a 99 the mirrors are supposed to be black. but because of that black is almost to easy and over done.