how much trouble to....

Might just be alignment. Not enough caster I would certainly "do" a complete exam of the front end for loose and worn parts. DO NOT neglect to check whether the BOX IS LOOSE on the K frame, along with any other cracked/ broke/ bent parts.

Checking for looseness is easy but dirty, time consuming, and meticulous. You need a second person. have them turn wheel side to side and look at each part of the steering for play, for "not following" the part next to it. Start at the column, look at it and the coupler. Look at the coupler and shaft into the box. Look for movement of the box. Look for any play, up/ down, side/ side, of the pitman arm out of the box, and for looseness at the stud end of the pitman. Look for movement up/ down of the idler arm, and play in the stud end. Same thing on each rod end.

Get yourself a shop manual and examine the ball joints. you want the lower arms jacked up to support weight and check play in the lower joints in that configuration