383 "Stock Piston Depth"

As per the Chrysler Marine & Industrial Tech Department

The 383's were usually assembled with the Deck Height .045" lower in the
Cylinder than the listed 'minimum specifications'.

ie; 1968/1969 '383' 4-Barrel
Was listed with a deck Height of {+.021" ab} above deck.

But, most of the Blocks left the Assembly Plant with the Flat-Top Piston
at a Deck Height of {-.025"} down in the Cylinder.