What is the bore and stroke of a Chevy 400?

bore= 4.125" stroke=3.75" multiply them like this, first get the circular area of the cylinder which is PI *r squared. so, pi (3.14159)x radius squared (half of the bore, squared)(2.0625)x(2.0625)= 13.3640. then multiply that by distance traveled, or stroke, so, 13.3640 x stroke (3.75) x number of cylinders (eight here) (8) = 400.92 cubic inches