Some information is available. There was an article in the "Generator & Distributor" (the monthly magazine of the VCCA) way back in the late 1960's on how to remove the lock cylinder, testing the electrolock and etc. There was also an article about how to attach the electrolock to the distributor in the Standard Auto-Electrician's manual as well.
Years ago Skinned Knuckles magazine published a detailed artical on the various types of electrolocks and how they work. Don't recall what year or issue of the magazine though.
The 1929-32 Chevrolet parts book has illustrations of the various parts used on the electrolock.
If you have any specific questions regarding the electrolock you can ask them here since there are several dudes on this site that rebuild/restore 1929-32 electrolocks.
