You're right Ron, you did write cam bearings, I misunderstood, it's my fault, I humbly apologize.
I'll quickly write a little story (do I write anything quickly?)
Most of the Clevelands I've disassembled have had the oil passages to the cam bearing plugged with old dry oil sludge. The bearings aren't being force lubed anyway, completely splash lubed. Sometimes I laugh at the oil restrictor kits, because with time the passages plug up anyway, the restrictor kit will actually accelerate the process!
So the needle bearing for the cam makes perfect sense, but I would prefer to see it as an aftermarket installation, not incorporated into the new block, I say keep the block simple, inexpensive, easy to manufacture.
If people start racing Clevelands again, parts like that will become available.
I apologize again Ron.
your friend on the DTBB, George
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