Saw a video of a v6 Stang having catastrophic driveshaft failure on a dyno at 135 mph...
So if you want to disable the FACTORY speed limiter, and want to drive it beyond the FACTORY suggested limit, you need to upgrade the driveshaft... Sorry just playing devils advocate again :)
Who in their right mind would ever race a car with a V6?
Oh, wait. :(
Have those guys on the mustang forums calculated the critical speed of their shafts yet? It looks awful thin for it's diameter.