[69vette427]

Any way of telling if a veh came from the factory wirh side exhaust? Pulling the body off and there seems to be alot of insulation between the body and frame by the doors. Haven't found the build sheet yet but don'tthink i will.

 

[2KVETC5]

Option N14 is designated for factory side exhaust. You should have multiple places to show the options originally placed on your car. The build sheet is one, and there is typically a plate inside the car.
http://www.alarid.com/history/specs/69.htm

 

[gtr1999]

I had the same insulation in my early 69 vert. I don't know if it was ever equiped with stock side pipes though. I heard in years past this was the case. I have the car stripped to the shell and there is no build sheet anywhere in it.