I am definitely regretting not taking photos! No vacuum on the transmission, just the linkage. As for the 4 speed, I just meant it shifts INTO 3rd gear way to early. I have not taken it far/fast enough to even get into 4th since this issue. I’m hoping somebody can chime in with photos of their linkage on a 76’ 300D to help me out (: and maybe I will post a picture of my own once I figure out how to do that lol