http://67-72chevytrucks.com/vboard/s...9&postcount=90
Its a Z58 White top as expected. Go by the RPO number first, then worry about the decription. In this case its the same option different description.
If you go to:
http://67-72chevytrucks.com/vboard/s...&postcount=216
This is a very early build 72 from St Louis.
It also has the Z58 RPO code for a white top without description and on another line CB8 "REMOVABLE TOP" which is actually the build conversion code. It like several other lines on this early 72 SPID are generally not listed and are found only on the actual build sheet. St Louis again had a lot of issues with SPIDs.
Also if you right click on a post number, it will give you a single post thread link code that is easy to paste into a reply when refering to a specific example.