An interesting study of bore and stroke

["Freiburger, David" <David.Freiburger@primedia.com>]

Let's assume you've got two big-block Chevys, both with 11.0:1, both with
the same solid-roller cam (253/260 at 0.050 on a 111), and both with the
same heads, intake, carb, oil pan, and headers. Both engines are 489ci.
However, one uses a bore and stroke of 4.55x3.766, and the other is
4.28x4.250. The rod-ratios are similar: the long-stroke is 1.53:1
(6.535-inch rods), and the short-stroke is 1.63:1 (6.135-inch rods).

What's the difference in the power curves and the required tuneup of these
two engines and why?

DF