You have a full spline 2wd shaft cut down . Thats the problem .
Look at yours and the pic posted by 6872xtc of a TRUE 4x4 shaft .
You have 2 simple options . Clocking ring as a spacer . Or cut the 241 input gear nose off a tiny bit .
I had to cut down my 203 input for this EXACT problem . Its all in my 203/205 doubler thread in the advanced section here .