When using the single-vacuum distributor, the vacuum hose runs from the vacuum port on the left side of the carburetor to the vacuum canister on the distributor. In that case, the vacuum port on the rear of the carburetor must be plugged.
For most cool season grasses and for folks living in northern climates, the best time to plant grass is in late August, early September. Depending on exactly the climate you have and the type of grass seed you're planting.
North Dakota: Vegetable Planting Calendar. Planting vegetable seeds or transplants at the correct time is important for getting the most out of your garden. Knowing your first and last frost dates will help you start your vegetable seeds at the right time. North Dakota is in USDA plant hardiness zones 3-4. North Dakota Last & First Frost Dates. *Based on statistics there is a 10% chance that frost will occur before or after these dates. Watch your local weather for more accurate dates.