What type of power needed to compete, with a 427 chebby? (Not stock 427)

So what do you think about the output, of that 427? No idea on cam specs, but i do believe he is going with a different cam as well. Also my brother will (not) be feeding it with a bottle. So what type of gearing would i need? Right now its got 3.23's. and i know those aint doing squat. I can get a pumpkin with i believe 4.86(or 4.88) gears right now.i have the turbo set up as well. I know you win some you lose some, but not against a mustang...... Oh so, you have rat poison ,yes? bad440 ? I would like to hear of this so called rat trap :D ..