Unless the piston is under some fairly hard stress it's not worth the trouble. The original rod squirters did some good.
Not that easy to do - there isn't much excess pressure/volume in these engines (certainly not in the pre-54 engines). You have to tap into a source at full system pressure or it just drools, and there's a big distance from the main bearings to the bottom of the skirt due to the very tall piston, long rod and long stroke.
A single hard line could be attached to the block ( screwed to the open areas next to the main caps) and plumbed into the pressure line between the pump and the block (metered with a restrictor), and individual jets aimed at the walls at an angle.
Probably better to modify the pump cap, and take pressure off the bypass valve port so that it never reduces system pressure. Way too much work, chances of failure, etc. unless you need it.
