Bed sizes

I have a 2000 tundra ST5 access cab that I just picked up this week. I am looking at a cap from a 2003 regular cab tundra.

Will it fit on mine? Are all the box sizes the same?

Thanks for replies and info.

Also does anyone have any suggestions for rack on top of cap. For boat or kayak.

 

Hi Jim, welcome from WI! As far as I can recall the 1st gen regular cab Tundras were only available in an 8' bed and your access cab is 6' 4".
Yakima makes some great racks and they have specialized attachments for canoes and kayaks. They make stuff for on top of a cap but they also have a rack that will attach directly to the bed with no holes drilled and its easily removable if you don't want it on all of the time.

 

Welcome from Western NC...pics of your Tundra please!