305 and 350 share the same stroke, so that doesn't change the size of the engine. Installing 60 over pistons would increase the displacement by 12 cubic inches.
413 cid
406 cubic inches .
Just over 67 cubic inches
359.3 cubic inches
455 bored 30 over is now 461ci
402
302
317
No
Just over 128 cubic inches
Just over 323 cubic inches
Why 400 heads? They are notoriously bad flowing heads without much modification the engine would be about 360 cubic inches, but the heads have nothing to do with the size of the engine.