I may or may not have done something very similar when the fuel pump went out on my 03 Dodge Ram. Iirc, I used a Jack stand on the frame to the bed. Apparently, when the fuel pump goes out on the Camaro, the easiest thing to do is cut a hole in the floorboard under the rear seat. Yeah, I won't be doing that. Too easy to drop the exhaust and driveshaft, then drop the tank.