Need help with measurements for trim on 79 Bed trim

[mdc9966]

Can someone tell me the dimensions of the tutone inserts on the bed. I changed the rusted out bed on my 79 K10 silverado and just messed up and didn't measure it before I scrapped the old bed. Now I've got a newer bed that never had trim so no holes to line it up with. I've attached a pic and if someone could measure theirs, I would really appreciate it. The area at the cab just needs to match the doors, I'm using the body line for the top, but the bottom at the wheel arches is hard to determine, it looks like there might be a slight taper going into them from the front and the back.