I have 89 Sub and the gas tank is between the frame rails in the rear. I am considering doing something different with that space, but in order to make that happen I would need to relocated the fuel tank. I would like to try and use stock Chevy parts as much as possible. So what would my options be? Saddle Bag tanks? What years? If these were from a Carb truck then how to I deal with the EFI? Inside the frame rails or outside? Dual Tanks? Any ideas, cautions, suggestions are greatly appreciated.