While my car '66 was in for paint, they removed all of the suspension including the rear torsion bars. Now I am getting ready to re-install them. I have never installed torsion bars so this is a first for me. I know there is a spline difference between inner (40) and outer (44). I am test fitting the bars and the outer fits smoothly into the spring plate. The inner doesn't seem to want to engage and slide in. Should they slide in easily? Am I missing something? Thanks