Well, my Swedish friend Roland bought a 70 GT350 Convertible #1204, in 1981 and it was painted red with painted gold side stripes. Repaint had been done by a previous owner in the 70's. When Roland started the restoration he hand grinded off the red/gold paint and to his big surprise he found white side stripe plastic tape and gulfstrem aqua paint under the tape.
Also, the 70 Shelby Brochure has a picture of a car that appears to be gulfstream aqua with white side stripes.
Roland's car a black convertible top and black interior.
Texas Swede