Will launching in second gear hurt my 727 trans?

No, i did it plenty of times. I do 2nd gear burnouts and roll up to the line in 2 nd gear and nail it.
60' times went from 2.25 launching in 1st, to 1.7 launching in 2 nd.
Bad track prep, lol.
I was foot braking it at 2000 rpm and running 6 psi of boost, nothing broke.