you are right about the single strap design not being safe back in 67 a barracuda got rear ended and the tank fell out and caught fire. So half way through 67 the 2 strap design came about. at least that is the story I heard.
That's kinda what I had figured. There isn't much keeping the tank from moving forward or back. They wouldn't have spent money to redesign it if there wasn't a problem.
Not that I plan to get in an accident, but I do value my life more as I get older...
