I was just running my street BFGs so I just tried to back into the tracks coming out of the water box rather than roll all the way into it. You are probably right though. I just eased into the throttle rather than nailing it for the burnout. It did make a couple of revolutions before the roll forward. Maybe the combo of more throttle plus the line lock will hold it in the spin a bit longer.
I actually don't know what the laws here in AR are about line lock activating the brake lights but I for sure will be in touch if I find out that I need it to. It might not be a bad idea even if not required, especially after the 5 speed swap.