What style of LR are you building? If you are doing another Lehigh, tipping the nose of the lock down will raise the tail, and the sear bar (that also can be bent upwards to thin the bottom for the trigger blade). Don't worry too much about the lock tail being above the wrist center line. You can file that a bit to bring it down. And put your vent hole a little bit above center on the barrel flat too. Going with a smaller RR can also help you not make such a big hole in the lower fore stock.
But I agree with Taylor and Fred. A thin web is probably the easiest way to make things thinner.