An alternative approach:
1. Create one chunk for each header
2. Add template variable at location in template where you want the header
3. Create the template variable as a drop down list with a value like the following:
ford=={{fordheader}}||chevy=={{chevyheader||
Then when you edit a page you can choose the header to use from the drop-down list. You can even use @INHERIT for the default value of the template variable to automatically use the header for add documents in a folder.
Andy
