G-Town Didn't grown about the Saginaw thread in fact have several in my arsenal. I assume you know it's easy to make a saginaw 4-speed with overdrive. It is a bolt up ,about the time I got one put together Hot Rod magazine came out with an article on it. Nothing wrong with Saginaws outside of being heavy,found an outfit in Shelbyville Indiana that had repairs for Saginaw,Muncie,Warner. Anyway on linkage just make your own out of 1/2 inch cold rolled rod,drill and tap for 3/8 heim joints bend to fit,on reverse can use 1/4 inch or 5/16 where it is close quarters. Made my own 50 years ago is still better than sloppy Hurst bushings no slack just smooth and quiet. Patrick's little catalog taught more about Saginaws (ratios) going by the rings on the input shaft than I saw anywhere else.