How to cram more gas into a race car... step one, innovation. Step two, dry ice 21 gallons of gas. Step 3, bring to the race track and cram into the Penske Camaro

that is a lot of frozen condensation on that drum

in the above you can see the can in the can, and below the drawing was found that gave dimensions

the above image image shows the car at the most recent Pebble Beach event, recreating the glory days of 1967 and the famous frozen gas trick

photos from http://www.camaros.org/forum/index.php?PHPSESSID=k0rdem8317u8nl330ji7usq3a7&topic=8309.15 and http://saacforum.com/index.php?topic=14660.75