Manual Steering Pitman Arm Question

yep, 3 pieces ... pitman arm, center link, and idler arm must be matching generation/type.

No need to change all that out. All you need is a small spline (manual) pitman arm that slides down through the top of the 73 & up centerlink. They do exist and FirmFeel has them. Plus you have the option of switching to a fast ratio PA in the future.