[Alex Blair (RIP)]

BRYAN....You are amazing...!!
Good work..
No ,Not all starters have thrust washers and are only used to align or take out excess end play..
Richard.is right...Connections and especially the Grounding points are critical in 6V systems..
The more grounding points and the better they are cleaned and tightened the better the electrical system likes it..Gages work better..lights are brighter .starters turn faster..etc..
I found that welders cables made the best heavy electrical wire...from battery to ground especially.
They are braided and very flexible and the current flows easily through them..Can be purchaced from any welding supply house by the foot...
Keep up the good work...
Don't feel bad either..starter bushings catch lots of people..