This is something I`ve been piecing together for the last 8 years or so, nothing special, `71 340, `76 727, and after that trip to the drag strip I`m in the process of changing gears from 3.55 to 4.10. It was running 8.6 in the 1/8. Lets see what this will do.... I also just aquired a 3000 stall converter but I want to see what the gears do first.