Torsion rod trouble

I have been doing a restoration on a nineteen sixty five Barracuda formula S. The engine and k member were taken out, As well as all the suspension. I'm in the process of putting everything back together, and I can't get the torsion rods to go all the way in and seat.
The only possibility that I can see is that perhaps I need to loosen the k member and see if it will slide forward. An eighth of an inch. Has anybody else experienced this problem? And if so, how did you come up with a remedy?