how much power will stock rods survive?

I personally think it would be well worth your time and money to dyno it. Why guess about the power and waste motor, these toys are high dollar. Rear wheel dyno's are also a great idea, shift points are critical even in street cars. Most think that if you don't have 700 hp that it's not strong, well let me tell you a 550hp motor will be scarry! in a street car.