2nd gear start

If it is a mvb, and transmission in good shape. Don't see the harm. HOW EVER! Your are putting a LOT of Temperature into the converter and more important into the oil. you need a lot more cool down and most don't circulate oil in park.
If you don't have a transmission oil temp gauge, it might bit u is the arss if you make it into the lower rounds were there is less time to cool everything down.