I had a Kirkham body for my FFR, but the expense of making it work with the FFR was not worth it. The TriStates body is a great compromise though. Another thing - if you plan on going the non donor route than I would suggest just steping up to the $40,000.00 Kirkham Cobra and be done with it the right way. I have well over that in my non donor ffr build. Don't get me wrong I like my car and it is done up very nice. My build cost though was way more than I ever thought it would be in the beginning.
Bottom line is the Kirkham Cobra is the way to go bar non if you are a purest. The FFR is a great kit, but can cost big bucks and be alot of work like anything else out there. They still look great! There are some great kits like the Superformance or Shelby car for example that won't require a lot of work yet yeild a awesome car. So for my .02 worth I say go for the Kirkham