Hi Brian, I am trying to find out the same info on the the yoke for my Kar.
Looking at Mustang 64 1/2- 70 Restoration Guide by Tom Corcoran & Earl Davis I think the yoke should be the type 2 listed on page 238 p.n .C3AZ-4851-L with a total yoke length of 5-1/16" which is about 130mm.
I am awaiting some clarification on this matter myself and will post the results for you if I find out. In Adelaide it is alot harder to find another Kar to look at than in the USA.
Cheers Zed