Dear Frank;
Okay; You'll need to be carefull here. These engines had no 'draft tube' & were sealed at the factory.
The 'KV' system removes by replacing the air cleaner or blocking the nipple that conects to the valve cover. Then you will have to block the valve cover opening too, or change to a non-vented one. Different years are setup differently.
The 'PCV' system is okay but you can remove it too. Simply block the openings.
Now; You must vent the crancase. A breather cap in the valve cover will do this in part. To vent the lower portion of the engine you will need to install a venting device as used on racing engines on the side of the oil pan. This will let vapors (blow-by)out but not the oil. This should be placed on the side away from the exhaust system.
The AIR system (junk)can just be put in the scrap metel area. You can block the openings with brass plugs or buy headers. You may need to play around with the pulleys & belts after this.
The EGR system leaves when you change to a 'high performance intake & headers.
As a beginner "walk softly here". Perhaps Larry or Mike will give you more help. They both work a lot on these engines and race them as well.
Good luck, John M......