Fenderwell cutting templates !

The collector has to tunnel thru the rocker to frame bulkhead to exit where you see here.
My car has already been pretty severely butchered for headers earlier. Do you think the Hedman fenderwell headers would fit through these openings? By the pictures it looks like the headers should end on the outside of the frame rails. I imagine it would be quite an easy option to just continue them on the outside of the frame rail, and dump out in front of the rear tire.
headers-cropped.jpg