wondering out loud here, but how many performance engines/race engines suffering from rear main seal leaks are running a properly functioning PVC system, utilizing one of those adjustable billet PVC valves ?
of course a vacuum pump is a good item as well.

Im running a sniper 1000cfm x-Flo. No PVC, just a dual catch can set up on it now. The 1st set up was a carb with pvc but leaked on initial start up. I changed to the sniper after I thought I had it fixed with the rope seal.

What rope seal did you use ? Fel pro , those are garbage .

I used the best gasket #5279 with success .

Best Rope Seals
I used an old NOS Rope seal on it because everyone was complaining about the felpros, which I couldn’t even find and all of the new graphite ones leaking. Like I said, dry as a bone about the 1st 1000 miles then one day she started leaking again .

I'll build you one, & I will guaranty it,,, might not leak.

I must be the second luckiest person in the world because I have never had a rear main seal leak on a big block or small block either. All with aftermarket cranks. I use Ultra Grey and put a thin coating on the outside of seal. Clock it 1/4 inch offset to the retainer cap, put a thin coating on the cap, tighten it down and fill cavity on retainer and outside channel with ultra grey. Done. All with Felpro seals and factory retainer cap.

Maybe I should branch off into the Mopar rear main seal replacement industry.