no reverse

i have an 833 trans in my valiant and it will not go in reverse, we are makin custom rods because the trans is out of a truck, the shifter worked great before and now when we went to put it in the car it seems that the shifter doesnt want to go move the reverse lever(the one on the shifter it self) but all the other gears work just fine, but when i put the shifter in reverse it moves the first and second gear selecter, im so lost so any help is appreicated
Author: admin