We use the 21 gallon Blazer tank because it's plenty narrow enough to fit between just about any frame rails and has a left side filler tube. Mustang fits good but the filler position sucks. Pics of a Blazer tank in an AD with a motorcycle pop up gas cap which is nearly invisible if painted body color.

[img]https://i.postimg.cc/PvQgq9Qj/003.jpg[/img]

[img]https://i.postimg.cc/1nJThwmm/004.jpg[/img]

[img]https://i.postimg.cc/YGZ6WC8N/008.jpg[/img]


Evan