[hotrod1]

Yep, everyone had great insightful comments. Here is what I decided to do - Measure the back of the tank at ride height the way it sits now - lets say that is 5 1/2". Take a long piece of 1x1 square tube and weld on two 5 1/2 pieces perpendicular to the long piece which would equate where the tires would contact the ground. Make sure the overhang on one side equates to the length of where the tank would possibly hit the ground. Then it is off to find common traveled driveways and place the "device" on the driveways to see if the long overhang side contacts the ground (with the small 5 1/2" pieces acting as tire contact patches) as it is traversed up the driveway (or speed bump - I don't think they will be a problem though). Hope this makes sense? Obviously the truck is not running and is at the end of the chassis stage and want to make sure its correct now so if tank/chassis needs changing, its easier now than later.