Right now our 408 is consistently a good 2 tenth faster then the 370 small block it replaced using the same heads....The motor is fairly new while the 370 small block did not achieve it fast times until it had 6 or 7 seasons on it....also the 408 is running with a 35 yr torque converter that will be replaced this winter as we are using a TA 3800 series that I bought back in 1983 from Herb McCandless for a whopping 250 bucks. That converter is an 8 inch converter that was design for Stocker back in the OLD days.....I am hoping to have a video camera in the car this weekend to see what the tach shows on the launch. But the weather will be around 100 degrees with the DA over 5000 ft. So time will tell....and Bakersfield in November should be exciting....