64 c10 panel truck bed questions

[rasanders22]

Hi guys, I have a 64 panel truck that had a rotted out wood floor. Someone a long time ago put in a pressed wood floor. I cut it out and have decided to built a steel floor. Does anyone know what the dimensions of the floor are? I know length wise its slightly over 8 feet long but I do not now the width. I would go outside and measure it but I am at work. I am trying to price out sheet metal. Any help would be appriciated. Thanks ahead of time.

Here is a picture