clearance during assembly as shown on the tech page of this catalog.
If you have questions regarding the head chamber details on your particular cylinder head JE
suggests that you contact the cylinder head manufacturer directly.
Another critical area of importance when choosing a piston for the big block Chevy is block
deck height and deck clearance. Standard deck height from GM is 9.800" however the GM
truck blocks, as well as some aftermarket offerings, have a deck height of 10.200". The
"tall deck" block (10.200") as it is commonly known, allows the use of longer stroke and longer
rod combinations for increased displacement. JE uses the 9.780" block deck height with zero
deck clearance when computing compression heights for all of our big block Chevy pistons
except where noted. Use the handy compression height calculator provided on the tech page of
this catalog to determine the correct piston for your application.