440 REAR MAIN SEAL FIXED!!!!!!!!

Quick fix is to seal crankcase holes with tape, then use a different car's running engine PCV line to pull of vacuum on the leaking engine, and then put an extension tube on a tube of silicone rubber to get up to the rear main seal.
You will hear the hissing of air being pulled in at that point.
Add silicone, and the vacuum will pull it in.
Rotate the engine one turn slowly while adding the silicone rubber, and you will hear the leak stop. Let cure for normal time at whatever temperature.
I have used the vacuum trick several times, on my vehicles and others.
Only once on the crankshaft, but it worked completely and lasted for about 4 years, until I rebuilt the engine.