Jeff,
Bill may be getting a little cynical in his old age....
but we have seen many schemes on this forum to help sell someone else's problem vehicle with varying results.... Regardless, Bill has more experience with more types of Cobras than probably anyone on this forum or anywhere for that matter.
If it were me, given the reputation of the Premier Kits, and you have the wherewithal to take on a project of this sort, I would jump on this opportunity. Tempered with the knowledge that you could find a listing of the parts you would need to complete the package or make up your own set up to work. I had to build my own control arms and many other parts for my Cobra as I didn't have the cash to purchase original style pieces at the time ($15K). I used Mustang II spindles up front and a Ford 8.8 IRS in the rear with the Ford IRS uprights. At least this kit has the rear uprights and control arms and the front control arms. Somewhere in the ad I believe I read that these take a 85 mustang front spindles and Ford Explorer rear end, assuming the IRS unit that is similar to the Tbird supercoupe unit that FF5, Superformance, and others use in their build. In the other thread I believe there is a phone number given out. It may be worth a phone call to get some info from the "horses mouth" so to speak so you can get your questions answered. It is obvious they aren't good about returning emails then or now, from the discussion on the other thread.
Once the suspension and steering set up is taken care of, most of the rest is just sourcing parts. We have a pretty good scratchbuild community here on Club Cobra, so if you need some assistance with finding parts and other information to move along with your build just ask away. I'm sure someone here will have an answer. I know I wouldn't have been able to finish my Cobra without these guys help and now I hope I can help the next guy with his build .
Good luck with whatever project you end up with.
Bob