bodywork on early cars

I'm interested in possibly attaching some GT Racing Glass or carbon rs flares on my 70 T. What advice can I get on this subject? How to attach. Rivets? How to blend in. Bondo? How does this actually last? Does it reduce the value of the car? I have 15x7 Fuchs with 215 rear and 205 front. Will those fill the flares? Do I need to extend the track?
When I traded my motorcycle for the car last year, it was a rust bucket. I bought a wrecked, but otherwise almost "new" 70T from Oklahoma Foreign and cut both cars apart with a hammer and sharpened wood chisel. I matched the parts up like a surgeon. Plenty of blood went into this project. I replaced the front suspension pan from wheel well to wheel well, the entire floor pan with parts from Restoration Design, and the entire back seat from my donor car. I rented a mig welder for the weekend ($45) and teaching myself in an hour on scrap, I proceeded to nicely weld the whole thing up with only a few small holes remaining. I got a nice sunburn from the welder- Use a hood.
I scraped all the paint off my car with Clean Strip, a pocket knife and a putty knife. I also dug into the solvent softened bondo on one of my doors. Watch out for that.
Anyone know anything about those carbon fibre dash covers from GT Racing? If It fit right and covered well, it might be a cool and cheaper replacement for that $800 stock item

Steel flares, butt welded in place and filled with pounded lead by a pro is generally seen as the best way to go. Fiberglass (and I presume carbon, although I don't know) have different expansion and contraction rates, which makes it hard to not get hairline cracks in the finish over time.

There are pictures of the process on my website, and also a picture of one of the abs dash covers in place.

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Jack Olsen
1973 911 T sunroof coupe