351W crankcase evacuation

[jse9]

I have a 351W that will eventually run a vacuum pump but for the time being I'm just venting into a breather canister. For ventilation points I drilled a hole in the back of the intake manifold, and through my fuel pump block off plate. I'm venting with -10 AN line. The breather tank is about the same height as the carburetor. I plan on using the hole in the back of the manifold when I put my vacuum pump on.

When I started to prelube the engine I started puking oil out of my breather tank. This is presumably from the line coming from the fuel pump block-off. How is oil getting up there? From what I understand, the timing chain and fuel pump arm just get lubricated from oil draining back to the pan, not pressurized oil. Is this oil coming out of the line normal considering it's height is well above the engine? It makes me nervous that I have some sort of blockage prohibiting oil drainback to the sump.

I stole the idea for the ventilation points from Jon Kasse's engine master 460 buildup, he vented from the same areas. He actually just had breathers mounted at each point, wheras I route them to a common tank. Hopefully my assumption that what works on a 460 won't nesessarily work on a 351W, and nothing is wrong. Also, does anyone have any ideas for other venting points closer to the crankcase than the rocker covers?

Thanks!!!

UPDATE
This is actually puking from the line that is connected to the intake manifold. I have it in the very rearmost v- part of the intake. I guess there is a strong stream of oil coming directly underneath it finding it's way into the line. If I disconnect the line and hold it vertically no oil comes out. I think I just need to plumb it closer to the middle of the intake. Right?