My 64 El camino has a three speed with the shifter on the column. the shifter seems to be broken because i cant find all the gears, 2nd, 3rd, neutral, reverse. Ocassionaly i will find reverse or neutral but i cant seem to put it in gear again. I was wondering if these shifters have a certain way of putting it in gear or is it just broken. If its broken any ideas what it may be and were i can find replacement parts. Thanks