340 compression ratio

It took me a bit to grasp the math, and I love math lol.
Big sheet of paper and a pencil. Lol
Swept volume(SV) is bore(4.07") X stroke (273-340 share same factory stroke) which is 3.31"
So 4.07 X 3.31 = 13.4717"
Swept volume is the distance the piston travels converted to volume.