I thought to build turbo boost all you had to do was hold down the brake pedal really hard and lay into the hammer to about 1600 RPM? This 6.0 Stroker that I dragged had some button on the end of his gear selector that he pushed in to build boost. You guys ever hear of something like this? Nick

It was probably roll control or line line lock. It locks the front brakes so the rear are free to spin.

line lock im sure.