Sorry about the being side tracked...Here goes some more. Starting with a 68-72 Nova fuel tank ( I think this was a 70). I used a couple of pieces of angle iron (1 1/2" back, 1 1/4" front) because I figured it would be lightweight and somewhat easy to fab into the mount I needed. I also used some 1 1/4"x1/8" strap for the top as a containment area for the tank. After figuring how far I wanted it back (to clear exhaust) I made my marks and started drilling. On the front piece I used (2) 5/16"x2" eyebolts for the front hooks of the stock tank straps to hook on to.
On the back I used The bolts that were on the stock straps ( I'll put new ones on) and in a little over an hour the tank was mounted.