Marcos Maniacs

I've been told the Wrap can greatly reduce the life of the headers, 
so I don't know if thats a viable option.   I also have the glassed 
in pedal box area and a flexible 2 1/2 vent hose going from the left 
grille opening into the glassed in pedal rack --- and it worked too 
good when I drove the car from St Louis to Minneapolis in February!
Also one on the right side(right side vent) to the passenger area.  I 
don't know if they're stock or add-ons.
Paul