Big Block 400 stroker .060 what CID ???

I will try to explain it once more and then that is it for me. Let's use a 340 as an example, ok? The 340 has a bore of 4.040 and a stroke of 3.31. That's all we need to determine cubic inch displacement. Here goes.

The formula is bore x bore x stroke x .785 x 8 (# of cylinders)

So,

4.040 x 4.040= 16.3216

16.3216 x 3.31 (stroke)= 54024496

54024496 x .785= 42.40922936

42.40922936 x 8= 339.27383488 cubic inches. Do you understand now? If not, I cannot help you.