Good idea Jon, had the tank made by a company in Yakima, Wa. made a template from cardboard and then did the cut and fit thing, is made out of aluminum and hold about 15+ gals. have not had the chance to do a front and back wieght check yet, but will let you know when I do. The tank was not cheap, but they kept all the info on their comp. so more could be made. Was made to fit my Beck, so not sure how it would work in other cars. Most the trips I take are cross country and just needed more gas to get from point A to point B. Any more questions, just let me know.
Thanks, Jerry