Re: Gas tank?
I tightened my straps till most of the gap was taken out of the straps at the bottom and they fit snug to the tank. You don't want this thing moving on you, but you don't want to crush the tank either. I also had an aftermarket tank on my 69 and the neck was too high. Then it developed a leak in the seam. Ended up replacing with a GM tank and the neck fit perfect in the opening, but I see some of the guys were able to adjust the neck with friendly persuasion. If you have new straps, try to shape them around the tank using your old ones as a guide if you still have them. Makes alot easier install. Another key is to get the car as high as you can so the straps will hang out of the way when you install the tank. I haven't seem many installs with the bottom rubber pieces on the straps. I opted not to use them too.
69 Z/28. 302DZ, Autogear M22, Red w/black stripes.
69 Camaro, ZZ4, 700R4, 8.5 3:42 posi, X11
70 Nova SS 396, 4sp, 3:55 12 bolt