MORE FORD OIL RESTRICTION
On FE Fords it is common to restrict the oil flow to the rocker arms. To do this, simply drop a Holley main jet, of the restriction size you want, right into the oil feed hole under the rocker shaft. If you want to pull it out to change sizes, just poke it with a toothpick and pull it out.

Ron Flood
Cedar Machine
North Branch, MN
February, 2020