Boeing 2707-300

I don’t know if it is exactly the good place to ask that but…

when Boing dropped the VG wing in favor of the delta (in October 1968), number of passengers was cut to 234. I suppose the plane was shorter…
The question is : what were the dimensions of the 2707-300 (final variant, 1969-1971)?

Another question : the prototypes were started in septmeber 1969, and the program cancelled in May 1971.
Aparently building the first two prototypes had started… I’m asking how percent was build at the time of cancellation, and what Boeing id with this stuff.

Thaks in advance!!!