1985 Power Ram 5 Speed

[hazzard03]

1st and 2nd gear seem to "off" if you move the stick all the way left and up or down it does not go into any gear, if you then push the stick moderately right and then up or down you can find the gear. Any suggestions on the cause and how to correct it? I am assuming I have a km-145 transmission but could not find the plate which tells you anywhere on the truck.