After many setbacks and rebuilds, we have finally got that big heavy 55 Chevy to break through the 12 second barrier.
The new cam gave us a much higher torque curve, so the old converter was too tight, and the rear gear ratio too high. A new 4500 stall converter, 4.56 gears, and a two step rev module really helped the launch and 60 foot times.

After some throttle adjustments, it ran 11.99, then 11.86 and qualifications were over. For eliminations the next morning, I dialed an 11.75 to compensate for the cooler air. We lost anyway.... by running an 11.615!! I have never been so happy to lose!

If anyone ever thinks building and dialing in a drag car is easy, just PM me. But, oh man, what a great feeling when it all comes together!