Well, I have got the newly re-vamped 434 ci SBC back. All we changed was the hydraulic cam to a solid roller, heavier valve springs and stronger valves. Also had to upgrade the carb to a 850 cfm. We tested last week and the results are quite good. We got 565 HP at 5600 RPM, 528 ft/lbs torque. The torque don't drop below 500 from 3975 RPM to 5900 RPM. This is still a 10:1 engine that can run on premium pump gas. The new boat is getting painted this week and the engine should be going in next week if all goes well. Still hoping for the 100 MPH mark. Will keep you all posted.