Plugging the reverse switch & neutral switch on a 6 speed transmission
 

I recently picked up a 6 speed from a friend, however, it was in a race car so the transmission did not have a reverse sensor or neutral switch. The "plugs" used were not the best, so I wanted to replace them.

One of the plugs threads as a 5/8(reverse switch) and the other one I could not find at Ace. I planned on going to an industrial hardware supply shop in the morning to pick up proper bolts. Does anyone know the thread pitch and bolt size for the neutral & reverse sensors on the 6 speed transmission? I've searched around and did not find much info on this topic.