Hello Kim!
I am glad to hear you find my site entertaining enough to peruse around for a while. The steel fender flares... I probably have to go over my notes to accurately answer your question, but this is what I read, was told, etc.
The GT's used 7x15 front and 8x15 wheels at the rear. Some GT cars used the "Minilite" wheels or a combination thereof (Minilites at the rear and Fuchs upfront). To my knowledge, there was a 914-6 GT that was built as a prototype to use the 908 Flat-8 racing engines. This GT, because of the added torque and H.P., could benefit from the use of larger rear tires and therefore, the 9x15 wheels were selected for this car. With the larger rear wheels and racing rubber, the Porsche factory stock steel fender flares were not wide enough and were extended to solve this problem.
Read this
http://home.hiwaay.net/~jonlowe/2sonauto011.JPG and look at this
http://home.hiwaay.net/~jonlowe/2sonauto03.JPGSince I don't own a factory built GT, I have the flexibility to incorporate in my GT project any combination and/or modifications that was ever implemented in all the GT cars. Some of the more unusual features were the “9x15 Fuchs” in the rear and "wider" steel fender flares in back, the "hinged side-rockers", and the "domed" headlight steel covers. My GT will be unique in the sense that it will have all of these GT features combined. More photos can be found at Jon Lowe’s website, located at
http://home.hiwaay.net/~jonlowe/You can see more photos of the #121 prototype 914-6 GT at
http://home.hiwaay.net/~jonlowe/2sonauto08.JPG I can’t remember the exact specification or size of the factory produced steel fender flares and will have to look this up for you later. Depending on the expertise and talent of the individual doing the steel fender flare installation, even if you started with the stock factory steel fender flare, you could actually extend the steel flare by at least an extra 1/2 inch or more without having to do the extra cutting, etc. that we did to correctly (and proportionally) space the rear steel flares. We used our method of installation to retain the intended look and shape of the steel fender flares and not make them too boxy looking. Grafting several pieces of metal between the spaced steel flares and the body of the 914, then making them look as if they were all one-piece, takes talent. See the links above of the extended rear flares on the #121 car and note how boxy looking they really are. I actually considered and almost used the 11x15 Fuch wheels at the rear for that "extra-wider-aggressive-look" but changed my mind because it would make them look waaayyy toooo wide!!!