904 help

sadly i dont know. The trans was out of a '78 coronet. When taking off slowly the 1-2 shift happens nicely around 15 mph. The 2-3 shift revs out and sometimes wont shift going over 40. If i get on it and let off then it seems to go to 3rd. It is inconsistent as the next time i take off it might shift to 3rd around 35. I have the kickdown cable adjusted to be fully tight (towards rear) when the carb is wide open.