John,
I will look for that specific thread and PM you with it.
I love top end- used to peg the stock 160 mph speedo all the time after I built my first 406 back in '91. My 'Bird had the stock 2.41 peg-leg back then, and would let me bury the needle (I'm guessing it wasn't accurate and I really wasn't going 160-170 mph). I had enough common sense to at least run V-rated tires, but my little voice was telling me that making top end blasts without a roll cage, saftey gear, and bigger brakes would catch up with me (and my luck not getting nailed by the CHP would eventually run out as well). So I cut down on the freeway blasts and persued 'safer' activities- street and canyon racing.
I'm really glad that there are safe legal events like the NHP- sponsored Silver State classic now- not cheap, but compared to gettting fined $2500 for going over 100mph, being charged with a felony and having your car impounded it's a deal. I'm far from being ready to run in that event but at least it's still being run.
What kind of trans are you running? The TKO 600 seems like a good choice and easier to install, but enough guys here are doing the T-56. It's said to be stronger than the TKO 600, but I wonder how much more.
Geno