No line lock, just an old Direct Connection brake proportioning valve. I just learned how to power brake a "stick car", now that I know how it is pretty easy. I just dump the clutch, then stab the brake with my left foot. The car jumps ahead a little but it should be ok, plenty of room in the burn box at the drag strip. I have heard of other ways of doing this, I found this to work the best for me, Keith.