If its your output shaft seal leaking into your discharge tube than you might have an issue with crankcase backpressure from blowby or incorrect routing of PVC system. Excessive crankcase pressure can travel up the S/C drain tube and make that seal leak. If you need to change that seal everything must come apart to get to it so a bearing refresh would be smart. You may also damage the bearings when disasembling the S/C.
Even if I run an open breather setup (no pcv)? Wouldn't the excess pressure go out the valve cover breather?
I just replace my head gasket because number 2 cylinder had zero compression (HG pushed in towards lifter valley).
1966 Vert: Work in progress, 6-cyl to EFI 302, AOD, Coilovers.
1989 GT:Ford Stroker 347, S-trim,TFS CNC 205, RPM II, Dynamic C4, Megasquirt, Baseline rear, UPR front.
2015 GT, Auto, Premium Package, Whipple 2.9, Corsa Catback.