Old Sparks, I know I'm converter challenged. I have a "metric" converter that is totally acceptable on the street but not optimum for racing. I don't have a tach yet so I don't know what it stalls at. Plus, with my 'don't hurt the equipment" attitude I'm just pussyfooting it. Gotta beat on it next time out. I do believe there is an 8" converter in the car's future. Thanks for he porting info, Dick. Gonna start on my steel Bantam coupe soon. it gets a 468 big block that my brother gave to me. Never been run.That should satisfy the unge to run more modern wquipment. The 300 Ford 6 in the dragster is built to be very durable and I doubt I'll ever have to consider an engine change.