Brett, thanks for the head's up on your sister's old car.
My friend prefers blue, white, or dark red on a GT/CS, but isn't ruling out anything so long as it's a great condition big block car.
He's also considering '68 Cougars...big block XR-7Gs and GT-Es. He likes black, dark olive green, white, dark red, and most of the blues on those.
I'm in touch with Royce and Propayne, on those.
If anyone knows of any for sale, please PM me. Finder's fee gladly paid for the right car.
Van