typer block .25 over ctr pistons on r rods
gsr head with rocket valvetrain 24e cams
whats the compression

 

ttt

 

..hmm around 12.3-12.5

 

here is a formula for you if you feel like doing some math.

V1+V2 divided by V2
when V1 is combustion chamber volumn and V2 is displacement of a cylinder
to find displacement of a cylinder/ pie (3.1415) divided by 4, times bore squared, times stroke