You should call the content of doc7 & doc8 in other documents that have different template.
You can do it with Ditto, getField, Wayfinder and other snippets AND i
think you can using @DOCUMENT binding.
The problem of using snippets is that MODx does not translate some MODx-tags such as snippets in new content, so i hope @DOCUMENT do it.
Another way: create a plugin to replace the "content" of current page with "content" of reference page before translating MODx-tags.
Another way again:
Template Switcher Plugin is what you need BUT it had critical problems!
read ALL posts of it’s topic first!