How is the best way to install new fuel lines from tank to engine on my 1982 corvette withour having to remove the body

The Lines I Purchased are preformed and only have a narrow passage way between the frame and the body by the back wheel well to slide the line in. Is there an easier way to accomplish this withour having to bend and rebend the lines. Please email me at [email protected] if you have any helpful suggestions. Thanks for your help