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Discussion Starter · #1 ·
I just got my BBC back from the machine shop and am in the middle of getting stuff around to install it. I went to put my pilot bushing in the rear of the crank and the hole is to big for the pilot bushing. The hole is nice and shiny and someone clearly drilled the crank for some reason or another , but why would they drill back there? Was it for balancing ??? HELP!
 

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what crank is it? Eagle Scat Stock??? The only reason to have done anything back there would have been to true that area if was ground.But is usally done just to leading edge of the pilot bore. That procedure done to center the crank in the grinder. No reason to remove material for balance won't do anything on centerline.

Have seen Eagles come machined back there but never tried to put a pilot bushing in.
 

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Discussion Starter · #3 ·
I just mic'ed the new pilot bearing and it is supposed to be 1.100 and it is 1.095 . I mic'ed the crank and it is 1.096, so I guess I jumped the gun my pilot bearing is machined wrong. Thanks for the response.
 
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