I was just referring to the OP's question of which one to use (clip on tank or loop on bracket) as the AIM doesn't show the clip, only the metal loop on the bracket. (Take a look, I never paid much attention to it until now). John Z replied in another post that the clip was supplied by Harrison, which still makes me wonder why it doesn't show on the AIM, 68 or 69. I just found what I thought was a reasonable answer, just 9 years too late, as to WHY it was used, when a loop is already present on the bracket. When questions like this go un-answered for 9 years, I just thought finally getting one, even late would be interesting.
BTW, It's interesting to see you have a Corvette Bronze Z from LA, March. I had an SS in High School that was Corvette Bronze, LA and I think Feb. or March. I wish I would have re-painted it that color as I think it's absolutely stunning, especially with the white vinyl top as mine had. Back then I thought it looked like rust because I had never seen it on car. (Mine had been repainted and part of the white vinyl top had come off so it looked like rust underneath.)