GM-GMC: ignition, steering colum, chevy 4x4

Question
I have a 1978 chevy 4x4 & just droped a motor in it and was trying to start it & it turned over 3 times, on the 4th, the ignition on the steering colum will not turn compleatly to the start position to turn the starter  

Answer
Same problem happened to my K-2500 in the last year.

A part broke inside the steering column.  It was quicker and easier to replace the column with one from a salvage yard.  In the interim, you can cut and break the rod that runs down to the ignition switch.  The vehicle can then be started with a pair of pliers (push down on the rod to start and up to shut the engine off).

If you do, buy a new ignition switch and install it on the bottom of the column before you install the assembly into your vehicle.