You missed my point. Why don't you replace the original tank with a aftermarket tank? Why is it so important to have it insisde the frame rails, right in the way of the exhaust etc.? Did the media hype scare you into believing that you are going to die because GM was irresponsible and put the tank were it is going to blow up if you get hit in the side? I have been T- boned twice in a Chevy truck, one time the full tank was crunched pretty good, threw another bed on and kept running the tank, the gauge was off a little after that. The other time the tank was smashed almost flat along with the rear bracket. No fire! I have dragged a few tanks around and over rocks and stumps in the woods and only once have I had one leak and that was because it was rusty under the brackets. Not sure if this is why you want the tank inside the frame but if it is it sounds like allot of work for next to nothing for a gain.