<VV> Engine building - bearing clearance

[Chris & Bill Strickland]

As for align-honing Corvairs, it's only for racers and dedicated 
machinist types -- a replacement block is FAR less expensive in a 
Corvair.  Now in some cars, like Porsche, where each engine is serial 
number matched to a specific chassis, and there is therefore a greater 
desire to preserve or restore an original block (among some folks), yes, 
it is much more common.  "Numbers matching" are high dollar buzz words 
these days, offering monetary incentive to do a bore alignment to save a 
block.

Bill