M35a2 clutch ?

[eagle4g63]

Here is what when wrong, one of the pivot points broke, causing all the problem with the clutch.

 

[btcoutermash]

Almost the same thing that happened to mine... Mine was the pivot that attaches to arm...

 

[Hooty481]

i had the same symptoms with my 818 a couple weeks ago and it turned out that my throw-out bearing had exploded. i hate that your was this bad

 

[Lukas Avkovsky]

Hello, maybe this has been said before but I have a problem with the pressure plate on my deuce. I have a 4 toe and one pawl doesn't hold and keeps loosening causing poor shifting.
My question is

1. Why is a 3-finger pressure plate better than a 4-finger one
2. Can they be interchanged without major modifications?