Well I did get my bolt out by using a 7/16 6 point socket. It came right out. I put the tank in the truck, fastened it done and went to put on the hoses and clamps. And found out the neck out of the tank was turned to the back of the cab and the fillet tub that goes thru the cab was in front of it. Shaking my head, I went back to the box it came from and found out it was the wrong tank! It was for a 55 to 59. So I took it back yesterday and got the 1st series tank. Will start all over tomorrow!