Crazy or not, I have embarked on the same journey to build the same great car as you, the Factory Five Roadster. I now have a 1998 SVT Cobra in the garage that I am preparing for the kit. There is a wealth of knowledge on here. I highly respect your opinions. I am looking forward to this and am glad it is a well trodden path.
One particular thing that I cannot compromise on this car is the relationship of tire to wheel well. It surprises me to see so many pictures on the FF company website that have tire sidewalls meeting up vertically with the lip of the fenders. Because the fender tapers in, there is no room for the wheel travel into the fender. As a result, they make the ride height with space between the top of tire and wheel well. They also must have severe limits set up in suspension travel. I do not want that. I want the tire to be able to travel in the fender for functional reasons and also aesthetic. I do not want to end up in a situation where I bought avset of FF wheels or other brand and they not fit perfectly. If you look at vintage examples of this car, you will see that the tire nearly always tucks in a bit and there appears to be plenty of room for travel in the fender. This is the look I want, but with 17 or 18" wheels.
Here are good fender to tire relationships:
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What I do not want:
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Please provide any advice on ensuring that I do not end up with a wheel and tire combination that end up interfering with the wheel well lips. The FF company cars do this and it concerns me that their off the shelf wheels will do it as well.