I am wondering about whether or not I should
conect the hose from the carb to the air intake at the oil fill cap?
What would you do?

 

What hose exactly? There is a hose from the 3/8 inch vacuum port on the manifold to the valve cover, then another hose from the oil filler cap to the breather filter in the air cleaner. Depending on the year, it could be the reverse of that. One of the locations in the valve cover will have a PCV valve. A PCV system is absolutely necessary; it should not be disconnected.

The PCV system is a means to circulate blow-by fumes in the crankcase back into the combustion chamber. Vacuum from the intake manifold pulls in blow-by through the valve cover, back into the combustion chamber. A breather filter on the other end allows fresh air to enter the crankcase. A PCV valve is in-line with the system to restrict air flow at heavy engine load when manifold vacuum is at a minimum. This system is crucial and should not be left apart. It is commonly discarded because it is often regarded as smog equipment, when it in fact has nothing to do with smog. It is a means to prolong engine life.

 

Right.
I am talking about the hose from the oil filler cap to the breather filter in the air cleaner.
It is currently disconected,as it was when I purchased the truck.
I was debating one the hose to the air cleaner,or a breather type oil cap.

 

Gotcha - got a funny story for you. When I bought my old LTD, which has a 351W in it, the hose that runs from the oil filler cap to the breather filter was gone, and isntead, the last owner ran a long heater hose from the filler cap, down to the ground! I couldn't figure out why they would do that so I got rid of that and hooked things back up like they were from the factory. A couple weeks later the car starts going through breather filters and soaking them in oil. Then I knew why - the blowby is pretty bad, that's why they dumped the hose to the ground. I put a hose back on, pointing out at the ground. That hose is supposed to be a fresh air intake but the engine is worn enough that it actually puffs blowby out of it.

So, that may be why your hose was disconnected; might be worth looking at if you hook it back up. A properly hooked up PCV system is essential, but if you've got an engine that is as old as the one in my LTD then it doesn't make much of a difference anyway if the blowby is so bad that it can't keep breather filters clean.

As for using a filter-type cap versus a stock cap and a hose, I honestly don't see how they can be any different because with a stock setup, you're just routing a hose to the filter, whereas with an aftermarket filter cap, you have the filter right there. I'm putting a 4-barrel intake on my 300 right now and when it's all done I'm going to put a breather cap on it since I'm going to run an open-element air cleaner.

 

That is so true,I'm hoping the blow by is very minimal if any at all.
I was looking at the breather cap's,they seem like they would get dirty quickly.
There is no way of replacing the filter in the cap.
What is the filter in the cap,foam?
Also I am running an open element air cleaner right now as well.I had to use a riser to accomadate the filter,there is a spot that i can drill out and attach a hose to.

I guess I will run the hose to the air cleaner and see what happen's.

 

I also got sick of the intake hose, the plastic flange thing was all screwed up and the filter never sat right in the air pan. Ditched it, and got the filter in the cap. When it gets dirty you just go and buy another. I notice that mine gets pretty oily, not in need a of a hose to dump it to the ground, but it's oily. I don't think it's blow by, i don't use any oil and the gas mileage is pretty good. I don't know anything about it though...

 

That's interesting,
Maybe I will go with the breather cap.