How to identify a non lockup A999 transmission with pics!

I have a 999 in my Demon, it has been a great transmission.
8 seasons of racing with 1 refreash, not bad.

I would have to look at it again, but I thought it had "999" cast into the topside of the convertor housing. It looked like it had been hand written, but casted in.

It has a low gear in it, but I don't remember if it was already in it.

I have a 904 with a std low gear & trans brake behind my 414 in the Barracuda.
Since we Foot - Brake, we don't use the brake.
I did have the transbrake freashened up, as well as the trans, since NHRA has went to NoBox across the board.