1959 Edsel Ranger, 292 auto.  The car was a barn find and had been sitting since 1970 - 70K miles.  Engine was stuck so I am rebuilding it.
Looks like the engine was all original.  The block has been bored 030 over, the crank was turned 010 under.  I'm using the original cam with new bearings and a new timing set. The valves and seats looked good so I have just cleaned and lapped them.  The rockers shafts have been disassembled, cleaned and reassembled.

I'm getting close to assembly and I'm looking for input on these modifications.

I have the original 5752-113 heads and FEL-PRO blue fiber gaskets.  The instruction sheet with the gaskets says to drill two holes on each side head and block (8 holes total) for better cooling.
Looking for pros and cons (if any) to doing this.

Should I plug the drainage on the rocker shafts to pressurize the rocker oil flow?