Anybody know anything about the differences in 71/72 Speedway TC Drivers

[f4radar]

 

[f4radar]

I was going to mix parts between a couple different drivers when I noticed the different style weighted arms. I had these touched up at at welding shop that repairs industrial tooling. Additionally, what would be the best lubricant for where the finger contacts the sheave hub that seems to be the high wear point.

 

[capguncowboy]

I stopped using any wet lubricants on my torque converters because it causes them to collect dust and grime. I use graphite. All graphite is the same, there's not one type that's superior to another. So far I haven't had any issues with any of my TAV systems