I'm sure this has been asked befor, but does any one have a picture or information of the correnct routing of the battery cables for a 1968 400 convertible? Also, is there anyone out there that has an assembly manual for the 1968 Firebird?

Take a look at this:

Doug,
Go back and look at the discussion and links to illustrations and pictures in /forums/ultimatebb.php?ubb=get_topic;f=23;t=002385

The battery cable does not use the tube in mine. It gets to the left front of the engine along the main cross frame member then runs back to the starter. I have the 400HO with the longbranch exhaust manifolds too.

The illustration in the parts book really shows it well. /forums/ultimatebb.php?ubb=get_topic;f=23;t=002385
Jim