I've been 193mph on old Moroso DS-2s, so I'm going with those (new ones). I need to get a pair of 28" tires, as my math gets me to 240+ with those and a 2.47 geared 9" rear axle. The lowest I can find for an 8 3/4" is 2.76s, and even Moroso doesn't recommend their 29" skinnies for Land Speed use. I have an old pair 29" tires with very good tread, but not sure it is a good idea to use them. I plan to use an 18 spline 833 but am not sure if it will shift quickly around 7500rpm.
Actual land speed tires are very expensive and only produced occasionally. I am confident the DS-2s will be fine at 240mph or so.