A few questions

I have to ask if the donor car is wrecked hard in the front end. A few have put time and effort in cleaning, painting, etc... only to find the K warped/spread, bolt holes don't line up.
The later steering linkage isn't really better, just different in how the pitman and idler attach to center link. You now have grease fittings to the road. Later has nuts and cotter pins to the road.
The shorter fatter stabilizer bar routed though the center of the later K is definitely better but I think that cut away K has to be a bit weaker/easier tweaked.