Ok Lammy, we had a little mix up in translation it sounds like. You said you had to "Put back emissions stuff". Over here that means you must put it back ON where it came from.
You can remove the AIR pump and all of the hoses and little pipes that run off it. On the 250 engine the AIR system connects into the cylinder head exhaust ports right between the valve cover and the exhaust manifold. Then as John mentioned you have to plug these holes in the head.
I would strongly recommend you leave the PCV valve in place, usually in the rear opening on the top of the valve cover, and run a vented oil fill cap, we call it a breather cap, in the front opening of the valve cover. Now the PCV system will work correctly and you can use a fancy chromed air cleaner if you like. Contrary to all that you hear a PCV system does not rob any horsepower or cause any problems. All out racing motors don't use a PCV, and blower motors don't generally use them either because of the lack of adequate vacuum to make a PCV work correctly. For a street engine a PCV is the best way to avoid gaskets seeping oil and making a mess of your engine. Run 3/8 inch vacuum & fuel hose from the PCV to the big fitting on the base of the carb, or to the fitting on the intake manifold which ever your engine has.
For the time being you can simply disconnect the EGR lines and any solenoid that may be triggering it but leave the EGR itself bolted in place. As long as the EGR is not carboned up and leaking it is in the closed off position with no vacuum to act on it.
If you can find a photo of a 1964 - 1966 250 USA engine but not with California emissions on it , it will be what you want yours to look like when you are finished except for the oil fill cap at the front and the vent tube going from the front to the air cleaner. You'll be using the breather cap to replace those 2 things.
Hope this points you straight for now.
Mike
