05Drive,
Here is another angle regarding a swap or mod of the kind that you are inquiring about: If you were to convert your V6 car over to a 4 valve modular engine with all of the supporting hardware to do so, then you would not be doing it because you wanted to build a Cobra clone per se but because you wanted to do a
modular engine swap. In other words, your wording should be: I want to do a modular engine swap, what is required?
Can I assume that you do not have a car yet? If that is the case then I would recommend doing the following: Buy yourself a '94-'98 V6 Mustang for cheap...~$3500. Buy a used Mach 1 motor from KarKraft for around $2500 reserving another $2000 for supporting hardware (ECU, intake plumbing, hydroboost brake booster, 8.8" rear end, tranny, driveshaft, exhaust, descent brakes and cool rims....there's more but that's a good start). I modular k-member may only be necessary for a '94-'95 car. Beyond that, the stock k-member will work fine. You could probably do the whole thing for around $8000, assuming you don't break anything!
Plan on having the car in your garage for 3 months. You'll also need and engine stand, hoist, welder (there is sime fabrication involved...) and a CDROM from Ford for the electrical systems for both the chassis and swap motor. Did I mention pinout charts and a good multimeter?
You know, if you really wanted a sleeper that was super cheap to insure, swap a modular motor into a 4 cylinder Fox chassis!
Hey, I understand it is a lot of work (read my sig, and I am still dealing with bugs) but is VERY rewarding and a great learning experience. You would also have a unique car (Mach 1 motors, as an example, ROCK!) that YOU created and it would be cheap to insure. I pay around $55 per month for insurance!
That's just my $.02
Take care and please feel free to ask me any questions regarding Modular motor swaps!
JT