Was this good thing or bad thing?

I bought a 67 Barracuda not to long ago with a brand rebuilt 273. The fellow I bought the car from installed the motor in July. He lived up in NY and moved to GA. My question is that I have goosed the motor since I bought the car. He drove the car from NY to GA and drove it some after the move around town and such. I talked to him yesterday and he said that I should take it easy on the motor since it dose not have many miles on it. I thought about that but I drove it about 80 something miles from his house and then put some miles on it myself around town before I nailed it the other night and she about went a around in a circle with me before I let off the gas.

Have I did a bad thing or is it all right since I'm sure the rings have seated by now?