Welcome to the forum.
Unfortunately, the answer depends on:
- What type of Cobra kit you have in mind
- What parts of the donor car the kit uses
- How you plan to register it to get it on the road
For example. if you were building this type of Cobra...
A Mustang would no use, as there is a BMW Z3 underneath.
So would you like to expand a bit more on what your plans are?
Good luck, Paul.