Been there, Done that. Had 4 wheel line lock on a stock '83 cutlass.
Used it with a delay box and MSD soft touch rev limiter. Ever seen a 17 sec box car? It got a lot of funny looks when it came up on the chip, lol.
It works, but you have to make sure the brakes are pumped up good before setting it or it will push through the lights.
Mine were mounted on the inner fender right by the master cylinder. NHRA has since outlawed them on some classes.
I think the RPM's it will hold would depend on the stall of your converter.