They have changed the way the make the rope seal. They used to use asbestos in them and thats why the used to work so well. No more asbestos so the modern rope seal isnt as good as the ones back in the day
69Firebird roundport/roller455
70Catalina 455
72Skylark Buick 455
89 Iroc 305 stock 192RWHP/263RWTQ
I cant leave anything alone.