<VV> question on main bearings

[BobHelt at aol.com]

In a message dated 12/3/2006 4:46:34 PM US Mountain Standard Time,  
ericmpholz at verizon.net writes:

Soooooooo,  If I understand this correctly, this crank that is  nearly
perfect stock sizing will require 2 sets of main bearings.   This will be the
only way to correct the 2 imperfect block halves? Or would  I just install
std bearings on all flanges?

Still thinking about  it,
Eric Holz



Oh, no, Eric,
That was for the factory builds. By now most, if not all crankcases, have  
had the main bearing webs recessed (i.e., pounded out) due to crankshaft forces. 
 So now to properly fit each main bearing journal (with an original crank)  
you will most likely need the FOUR different bearing sizes that were  
originally available from Chevrolet to select fit each journal. (std, 1 u/s, 2  u/s and 
3 u/s)
 
For reground crankshafts, you have little choice but to use the appropriate  
undersize bearing set and hope for the best as far as main bearing clearances  
are concerned. You could possibly shim these bearings to get a better fit.
 
Regards,
Bob Helt