I've always thought it was no. No offence to Ken or any of the guys trying to beat the old record. I just think that is was one of those moments in time when desire and sheer luck met. It’s a very deadly speed and I think the mortality factor will be the restriction for beating it. I really doubt Ken knew how close he was to death back them. I think he figured it out after the fact and that why he’s never tried it again. No point to cheating death twice. The margin for error is so small that it is probably just not worth doing.
However if it is going to happen, it will be in a BIG craft like the Phenomenon boat. A larger craft will have a little bigger margin for error, thus lowering the risk potential…albeit only slightly.