68 Barracuda Front Suspension Rebuild Kit

unless you have or know somebody with good fabrication skills and inherent knowledge of steering geometry and the design specific to these cars-- or access to a 68~72 k-member that you can measure closely and pattern a mount off of-- converting the 67 to 68+ style is a tall order.

upgrading to 68~72 or 73+ is a much better path forward. yes, there are associated expenses involved, but going forward you'd have a more "coherent" steering system in place.

the most likely scenario is that the idler arm is just waxed ***. replace, or replace + upgrade to a rollerized bearing is probably the easiest path forward, but that too comes with expense (500 clams, five or take)