727 Time to rebuild
Not sure where the idea of Mr. Randy's rear servo's cause a clunk cause the ones I've used don't. Nevertheless John Cope is a decent guy to deal with. Good products and good service.
I've installed many TF-2 kits and if you leave the accumulator spring in (which I recommend with a stock converter) make sure hole "B" is at least .086" and it'll be a real nice firm shift but won't shred the tires. Also when you go through it make sure there's at least 10 springs in the front clutch (I generally use 12 but 10 is fine for your application). If it only has 6 or 8 springs you might get some 2-3 shift overlap which is real bad.