You stated that you wanted a Cobra Kit. You also mentioned Superformance and Backdraft, as well as Factory Five. Factory Five is the only Kit of the three mentioned. Superformance and Backdraft come as Turn-Key minus only, and a dealer can make it totally Turn-Key if you wish. Factory Five is a build it yourself only option (or pay someone else to build it), But FFR does not do any assembly as an offering.
Do you want to build, or go Turn-Key minus/Turn-Key? After that decision, then you can start narrowing down the manufacturers.
As for long legs:
Long wheel bases, The new Everett Morrison, Excalibur, Classic Roadsters*, Lone Star for kits; and Backdraft and Team-C for Turn-Key minus. Other kits/replicas offer dropped floor pans for extra leg room, but still have the 90" wheelbase; Superformance, B&B, and others.
As the others said, the right choice is simply to get the one that has what you want in a car. Chevy is certainly not a Shelby type product, but you can build twice the Horse Power for half the cost of a Ford engine. Re-sale will be lower with a Chevy though.
Check out
www.cobracountry.com and read, read, read. You will change your mind many times as you learn the differences in the cars. Budget and purpose of the car will often be the biggest influence on your decisions.
Have fun and keep asking questions!
