390 stroker

Your Engine with bore of 3.940 and stroke of 4.00 is 390.15 CID

http://www.wallaceracing.com/cid.php

BUT a 3.94 bore ISN'T a LA 318.....The bore on a LA 318 is 3.90625. Did you take this and add the .030 to it? If you take 3.90625 + .030 its 3.93625

I see the mistake I made, I took your 3.94 and added the .030 to that (which would then make it a .060 overbore), My bad!

You'd had simply added it, rounded it up and it still comes out as a 390.....