OH140-160033J no spark

Hello everyone!
 
I just purchased a 1979 GMC C30 bucket truck.
 
The hydraulics for the bucket are powered by the OH140. Unfortunately engine will not start. No spark.
 
Found a manual and started looking into ignition unit and ALT Coil. Ignition unit looks fine no cracks insulation intact, Shot the stator coil lead to ground its reading 172-175 ohms. 
 
I'm not 100% percent sure but  believe I have the 10 AMP stator. I'll try to get a picture up, but it has the flat connector 3 pin. Not the connector with 2 flat 1 on top. If it is the 10 amp it seems its bad the manual says 400 OHMS or less replace. Is this right?
 
It seems there are a bunch of part numbers for the stator, can anyone point in the direction on where to find the correct one, maybe a PN for the OH140-160033J?
 
Also are there any checks I can do on the ignition unit to verify it is good?
 
Thanks in advance for any help.