ACC Carpet 1954

[67z28]

I bought a new Auto Custom Carpet from National Parts Depot. I bought the full floor carpet, because I have newer seats in the truck and have removed the welded in seat frame. When I put the carpet in in seemed to not fit correctly. When I had the taper of the carpet fitting with the taper of the cab, it was around 3"-4" short by the fuel tank. When I pulled the carpet back to the fuel tank lower brace, the carpet was 1 1/2" +- to narrow on both side of the floor. Am I doing something wrong or do I need to buy the carpet that is for a removed tank even though my tank is still in the cab. Any help would be great.