Whoa! Maybe in theory. But you cannot take as much off of the block as you can
the head for the simple reason that you would be exposing the pistons above
flush to the block.
There may be several reasons for decking a block, but one certainly is to
assure a flat mating surface to the head. To properly deck a block you first
have to measure all pistons and find the highest at top dead center before
taking the engine apart. The difference between the top of the block and the
highest piston, less a clearance height (.005"?), is the max amount to be cut
from the block. Realize a typical human hair is about .004" thick. Cut below
the highest piston height and it will crash into the head the first time you
crank it.
Another purpose for decking the block is to assure near identical compression
in all cylinders. This must be done, though, by also insuring your connecting
rods and pistons are the same length. A practice more for the competition
engine than a street engine.
Greg Dito
CD6250L
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