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Discussion Starter #1
Where should the 2 holes in the front cam bearing be clocked to?
 

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Discussion Starter #2
OK I compared 4 engine blocks today and it seems there is no correct clock position for the front bearing.
 

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From S-A Design's 'Building the Smallblock Chevy':

1955 and '56 265cid engines used a special, wide rear bearing (number 5) with two oil holes. The oil holes on these early engines must line up with the feed passages in the block, and the rear journal on the camshaft must have a "flat" machined in it.

All cam bearing oil holes in 1957 and later engines can be installed in any radial position, however, many installers line up the oil holes with the feed passages to the main bearing bores.
 

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I think it might be slightly more beneficial for the holes to be at about 5 o'clock, viewed from the front. The front would be at about 3 and 5 o'clock.
The theory was the oil would be under the highest pressure area as the cam rotated. It may not be significant, but it can't hurt. :rolleyes:

Jeff
 
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