i need help with my 1 barrel!!

I just pulled one of these carbs off a '73 slant. The open nipple you have on the right goes to the vacuum can that you have hooked to the nipple on the left. The nipple on the left goes to the EGR valve but can be safely run with a rubber cap on it. On the valve cover side of the carb are 2 nipples. There is a small one just above the carb base that runs to the vacuum advance on the distributor. There is also a large nipple in the carb base that goes to your PCV valve in the valve cover. Hope this helps.