I got a 1964 C-10 LWB with a 230 straight six. The tranny is gone. What will work in its place??? It was a three speed column shift but I would replace it with whatever will work. What tranny can I put in this truck where I will not have to do any major modifications?? I don't want to mess with the clutch, bell housing, or drive shaft. Is stock replacement my only option or is ther an automatic that will fit?? SOMEBODY HELP!!!!! thanks