Donnie Pedan is running a 737 on a throttle stop, he was running 9.91 at 193 mph. Donnie's website is
www.countrymotorsinc.com he is a great guy and helped us with our converter on the car below.
Back in 05 & 06 we had a Haas Monte Carlo with a Schmidt "Hulk" 705 c.i. we never ran a throttle stop but we did run a 7.05 @ 196 on motor at 2450 lbs. and that was with a very conservative tune on the motor.
One thing I learned on working on the big motors is to think conservative and do not take big swings on the tuneup.