Technical Oil filler in place of crankcase breather?

Hello people, I'm in the process of making an adapter to put a GMC L6 valve cover on my Chevy 261 engine.

Since Chevys have the oil filler cap on the valve cover, and the GMC on the block, i need to come up with a way to fill it up. I thought about copying the GMC setup, but when removing the breather from the 261 i found out it comes out behind the camshaft (looks like there's a cover around it) and from the pictures I've seen, right above the #2 main...

I suppose that since it is a crankcase breather (PCV actually), it is by simple logic connect to the crankcase, but the p***age seems kind of small to use to fill up the oil.

Has anyone done something like this?
I don't really want to put the filler on the cover, but if that's my only option, I'll do it...

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Make sure it's clean, then just pour in the oil slowly.

 

If it's the same as a 235 there is a baffle directly behind that hole. As said before, the oil will go in, but slowly. You could use what's left of your old road draft tube and make something up where that tube can be used for filling and also as a pick -up for your PCV valve. Like a 2 into 1, but you would have to wait a while for the new oil to clear the tube after filling, or you will end up with a blast of oil into the PCV system.

 

Thanks, I'll give it a shot then, keeping in mind that it will go down slowly.

I actually have to change the oil on this engine soon (by age rather than mileage), so I'll report back soon on how it worked out
(on a note, any tips on cleaning that hole? Perhaps dropping some gasoline and removing the oil pan?)

About the PCV, this engine is actually a factory PCV engine rather than a road draft one, and that (the piece I'm removing) is the end the air filter connects to (the valve end of it is on the valve cover), but I'll keep in mind it can **** the oil up.

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Any stock '37 -'48 car or 1/2 ton has the oil fill in the road draft tube. Just bum one from a restorer.

 

I would pull the pan, then you can get a look at the shield. Then clean away with what you find that will cut the buildup. Spray carburetor or brake cleaner should work. A compressor with a blow gun will help also.
When you do clean it you will see all the **** that could have just ended up in the bottom of the pan.