Very much not worth the trouble. The stock tank does not really take up that much space, not really as big as a large suitcase. The car being a unit body will not be safe with all the cutting away of original stuff. I believe the tank is the closure between the passengers and trunk too.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.