so all i need to do is drill some hole on the side of the tube up from on the bumper tubes were the shock cover is and the fluid will come out and i will be able to push it in , and weld it up ?
You got it. Your car should have the shock type bumper mounts. They were Chryslers way of meating the fedraly mandated 5 MPH bumper law. They are filled with fluid so when you hit some thing they give and cushion the impact of a collision a little.
So if you drill the cylinder out and drain the fluid out you can slide the bumper in to were you want it to be closer to the back of the car. Then just weld the holes up to lock it back in place.