My '74 Challenger smells like gas even though I cannot find any leaks. I have a 5 gal poly fuel cell in the trunk and run -8 line to the regulator and -6 line to the carb. Would an aluminum fuel cell prevent the gas smell better than poly? Should I run solid line up to the regulator instead of braided? I have an attached garage, and I hate my house smelling like fuel. Any suggestions would be appreciated.