[Fot] 1147 Crank Seal

[Jay Creel]

Hey FOT,
   
  I have located and purchased an 1147 crank for my race car, there is a difference from the crank I had before in that on the flywheel end of the crank there is a "scroll" (looks like threads so as it rotates it returns oil back to the block) in the fat end.  It appears that this design would "sling" the oil back into the block, but I am not sure of the purpose.  
   
  My question is, does this type of crank design use the same rear seal as the crank without the "scroll"??? Or do I need a different type of seal??
   
  Thanks
  Jay

       
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