Here's the thing. Start with your pitman. Is it worn? If not use it, and make CERTAIN it fits the center link correctly. The holes may have been "diddled." Look carefully at the diagrams I posted of the early / late setups. ALL THREE PARTS, the center link, the pitman, and idler, must match. You cannot just turn the center link "upside down."
Now if the first two parts are OK, and the holes have not been reamed, get an idler to match the first two.
Sorry, but I'd bet it's been reamed out to fit. This means, at the least you'll need a center link.
The "key" is what pitman you can get to fit your box. That is, whether it's large or small spline. You can use EITHER setup. Example, I converted my 67 to "late" spool K BUT used EARLY center link set up UNTIL NOW that I'm painting it........converting back to a power box. When I get done, it will have a LATE pitman / idler / center link, using the same tie rod ends.
