340 Block Deck Height

deck height on LA engines are "around 9.59-9.60"...due to production variables ...unless the block has been Squared...the front to back number with be different ...and left to right bank will be different...

deck height on the piston...is going to vary due to issue above..plus production tolerances in the stroke of the crank..plus the actual center to center of the rods...a 70 should have a positive deck height around .008....NHRA blue print spec is +.045...

the early pistons had a compression height around 1.84...