[Excaliber]

Seems to me you can get a "real" 427, in various configurations, for about the same price. 351 out to 427 is all but maxed out. The LONG stroke and small bore are like the design thinking of a 428. Relying on stroke for a large part of the displacement.

The "real" 427 design was classic race thinking, big bore, short stroke. Most the of the great engines of yester year and today follow that principle, "over square", big bore relative to their short stroke. Porsche being a classic example, there are many others.

The small bore will not allow for big valves, compared to a "real" 427.