Footbrake vs. Transbrake

With a 2 step, foot braking and line lock will a car hold at 3500 rpm or is it going to creep ?
Without a two step (never used one) both cars can easily hold 3500 without creep. Both have around a 5k converter. Slow car has drums all around, 122mph, faster car (NOT fast!) has tiny factory girling discs and jfz's in the back, 132 mph. If im not running a
footbrake class, I always use the tb in the Tina.