I just picked up a complete set of Fel-Pro overhaul gaskets for 292 block.  There is a note included with the set about adding additional holes in the block and heads between  the middle 2 cylinders on each side for additional water flow (cooling) of the inner cylinders (in case they don't already exist).  Anyone done this?  Any thoughts?  Im about ready to pull the heads and install new head gaskets....correctly.