Bill, what size are the ones you ordered again? I wonder what the biggest straight we could fit on the base GT brakes is. I ordered GT brakes and I'll be painting em red and don't want them just plain red so I plan on putting something (probably "Mustang" like you) on top.
Also, paint protects your calipers from Rust. I had a car with good quality red paint and it never chipped or wore off in 6 years of owning it.
It's a fairly long process todo it properly yourself. Took me a few days but I went really slow. Also the cleaning process took forever. The calipers were rusted pretty badly.