[eschaider]

Nah...

You want the 427 cylinders in the middle four. That way, the heat they radiate is relatively uniform in all directions, allowing the engine to do a better job of avoiding hot spots. Annnd, an extra added attraction available at no additional cost would be the reduced longitudinal couple in the crank balance attributable to the center placement of the potentially heavier 427 rotating assembly components ...

The short-rod 347 cylinders would potentially have more torque than the long-rod 347 cylinders, so they could be placed at the rear of the block closer to the flywheel, improving low-speed performance.

The more I think about this configuration, the more impressed I become! This technique puts the best of every engine in one engine, and the displacement should work out to be ((427-347)/2)+347 or 387 inches — this might just be the ultimate engine recipe.