Steve, I have excessive heat in the summer here as well. The guy on Facebook making them is Greg Henry of Calgary, Alberta. Search him, he shows up. He makes about 20 of them for Vegas every year, when the mood strikes him. (He also does about the same number for the Monza.) The finish is wrinkled. The quality is excellent. It requires no modification or drilling. Just silicone under the side-strips that slip under the glass trim. The louvers bolt to the side strips. He charges $300+shipping per set. I have 3 sets on my cars, a 75 Cosworth, a 72 GT and a 77 GT. As you may expect, the metal louvers add additional weight to the hatch, but my lift arms will hold it. Just don't slam it shut. I press-lock the latch.
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Steve, I have excessive heat in the summer here as well. The guy on Facebook making them is Greg Henry of Calgary, Alberta. Search him, he shows up. He makes about 20 of them for Vegas every year, when the mood strikes him. (He also does about the same number for the Monza.) The finish is wrinkled. The quality is excellent. It requires no modification or drilling. Just silicone under the side-strips that slip under the glass trim. The louvers bolt to the side strips. He charges $300+shipping per set. I have 3 sets on my cars, a 75 Cosworth, a 72 GT and a 77 GT. As you may expect, the metal louvers add additional weight to the hatch, but my lift arms will hold it. Just don't slam it shut. I press-lock the latch.