The faster a car runs the harder it becomes to overcome a penalty. I agree with you on the overbore, 5 cu in does not overcome the penalty especially when you are talking pump gas motor. I look at this as a real world guide for other members to see what certain street car combos really run.
Agree, sharing combos and seeing what others are running in street form is a great tool. Ironically, one of the fastest cars in the race has won it the last 2 years.