[Todd Spence]

Bullseyeprec, I also have a 392 crate in a backdraft. I had a high performance shop tune it with a Davinci carb and it dynod 347 to the rear wheel. They told me it converts to about 410-420 out of the motor. I was surprised to hear someone got 461 out of the same engine. Even with 347 rear wheel it runs pretty good. Good luck on yours. Todd