Trans help for a friend needed

I guess I'll start with the easy stuff as Bad Sport mentioned. I'll check the universals again. The car doesn't want to idle below 750-800, likes to stall. I would like to get it down to 600-650 if possible. But I believe that if I get the idle down, it will still have a pretty harsh engagement. I'll address that again when I can open the doors of the barn. To RustyRatRod, if it's not sticking, can the kickdown affect the trans engagement at an idle? It's presently adjusted so there is no contact (end of cable / carb throttle)? Can choke / fast idle (cold - warm) have an effect on this? I will check to see if it is sticking or influenced by fast idle. Tell me what you all think. Thanks