Cam advice for more torque from 340

There is a hole in the front of the block, on the drivers side, where the timing cover bolts on. This hole goes into the water jacket. It is possible to put too long a bolt in there during the cover install, and it is possible to drive that bolt right through the cylinder wall. This will allow water into the oilpan and really spoil your day when you find out.
BE CAREFUL!