Big Block 400 stroker .060 what CID ???

If a stock bore in a 400 block is 4.342. And you are .060 over (4.402), using a 440 crank at 3.75, then you have 456 C.I. Rod length, deck height, etc. does not affect the displacement. Only bore and stroke. .07 over would be 458.

pi x r^2 x stroke x 8 = C.I.