Spectrabrent, I built a long rod 514 BBF for my Howard wood deck flat. It replaced a 466 [+.030] I've only run the engine once since I installed it and was easy on it when I did but I was happy with the results, pulled hard to 6200 [plate down-hull wet] Should easily turn 6800-7K off the plate. 25% gear/11.5x15 prop. So far I am happy with the new engine. If you go with a Ford crate engine get the optional Eagle rods that are available with the engine as the stock CJ/truck rods aren't up the the task for boat use. I have heard of a few engines kicking the stock rods out.