[coyled]

It depends on the application in my opinion. For a street or drag motor, its nice to have more cubes and less rpm and you will be happy. If you want to thrash it on a road course, Any motor turning 7000 rpm or more needs a pretty stout valve train. If you are going to run it hard, 351 ci motors will stay together longer than a stroked version and you will want better valve train components in that case. Shelby was gernading 408's in the spec racers and has since gone to bullet proof 351's with no problems. Scott