A-833 OD transmission what type is mine? 421,422??

Just make your own linkages, I used 3/8 hollow steel tube from Lowe's bent it to shape with my map gas torch. Then i welded a 5/16(i think?) Bolt on the end for the adjuster. On the other end i welded on a junk bolt, cut the threads off and bent the shank 90 degrees and then drilled a small hole through it for the spring clip.

Like Matt, but I used 7/16 I.D. cold-rolled. I cut the ends off some old junk linkages and plug-welded them into my new custom bent rods.
I used the bigger tubes because I had a longtail and I moved the shifter back some 8 inches.