I'm still unclear on the 139 tooth option here. The 139 was the 6v? What Nissan starter drive works? Does it fit a 12v GMC starter or do you use the Nissan starter? Also are you saying that a V8 gear on an L6 starter for the 168? Thanks for this input I had not heard this before.

"I wonder if God created man because he was disappointed in the monkey?" Mark Twain