ur gonna get rid of ur stock fuel tank and put in a 5 gallon tank ON THE INTERIOR OF UR CAR?, theoretically its not that hard but why? ur gonna be huffed from fumes buddy, alot less safe, its just a matter of getting the pumped hooked up on the new container with all the connectors nice and tight to avoid having gas leaks in ur ride, and of course ur gonna have to change the setup of the filler neck on ur gas tank to get the gas into the container, or i guess put the hose in ur car when filling but once again why? id really suggest against this unless ur planning on getting rid of the fuel tank for room to add a rwd system or if u want an all out drag car and only wanted like a 2 gallon tank in there. be careful buddy, and please tell me the fuel cell is made to hold gasoline?