Undersquare vs. Oversquare Engines

For the most part building cid with bore size is more advantage then stroke. Bore size is the ultimate limit to power.

It allows for better breathing more rpm and longer rods.

Now for torque everyone always goes on about the crank multipying effect. 4" vs 3.38" which is true but totally disregard that the the 400 bb has more pistons area then the 360/408 given more pressure applied to the crank to be multiplied. Which pretty much equals out.

Head wise the bb has more port area given the bb a definite advantage. 360/408 struggle to breath. The 400 bb has thr ability to make as much if not more low end power cause stroke is really no advantage as I explained earlier but also the 400 bb has better breathing ability and allow for longer intake runners. Plus the 400 bb has the ability to turn way more rpm over the 360/408 given it way more potential for power.

The only advantage for the 360/408 is size and weight. But for that extra weight your getting a way stronger block. If you were to build a race block 360/408 the weight advantage would disappear.

Even 383 have more potential.