Pressurizing Camshaft Thrust Oiling On Big Block Chevys (#17)
Start by drilling through the lower thrust face in the block to intersect the #1 main feed hole, then partially tap the hole to insert a 6-32 set screw. Drill a 0.028˝ hole in a brass set screw, for a metering jet.
Use a brass screw because it will drill easily. Put in the set screw with
Loctite(tm) and install the metering jet. This works for many other applications where you want to
meter the oil. Don’t forget to chamfer the drilled hole.
Expressway Machine Shop