Today's Grand National boat owes its heritage to the marathon races of the 1960s and ’70s. These grueling races tested man and machine over distances of 100 to 500 miles over two days. Endurance was key. The Miami 9-Hour Enduros challenged hull and engine builders to craft the strongest, fastest boats possible. Many great drivers and celebrities have tried Grand National racing like motorsports legend Mickey Thompson, stunt pilot Skip Volk and Vic Edelbrock – even Elvis took a Grand National for a lap or two. Today’s races generally run about 15 minutes each, with an occasional 30-minute or 1-hour event. The all-out “push it as hard as you can, hope it holds together” attitude has always been the trademark of a great GN race. Here to talk about Big Blocks and Drag Boats is our friend and fellow captain Jack Sisson.