Those louvers look good, RYD PNY. Oldtimer Stanger, I definitely think those Silverhorse flush-mount louvers (like on ryd's stang, and many others on this forum) are the cleanest looking option there. Although they are a bit of work, because you have to remove the rear quarter window. Do a search on them and you'll see a bunch of discussions and pics for them. Do you like the flush-to-the-body look, or the big louvers that stick off the side of the car?
Cervini's has got some big scoop louvers for the old-school Eleanor look.
ryd, what tint % are you using?