Posters to the 914 Club, bear with me....
Okay...the PO of my '73 installed a set of the Mayuer (spelling?) stiffeners. I've never read the installation instructions for installing them, but I'm pretty sure it doesn't say anything about drilling holes (6 per side) all of the way throught the the longitudinal, and securing the stiffener with threaded rod, washers and nuts. My problem is that in doing so, he drilled through the heat ducting running through the longs. I absolutely will be using/needing heat in this car and was wondering what the ducts are made of. The little I can see of them looks kinda like the aluminum flex duct used on VW Bugs fan shroud, but I'm hoping they're a little more durable than that. I could always take a cutting wheel out to the '75 and let the sparks fly, but I was hoping someone on the board had some pics/info about them.
I went out and took a couple of crappy pics to illustrate the installation done by the PO.
