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.
Starting a Lawn with Seed. Seeding is the easiest and cheapest way to establish a new lawn. The best time to seed warm-season grass in most parts of Florida is between April and July, permitting a full growing season before cold weather. Seeding your lawn can be much more cost effective than planting sod, but it depends on which turfgrass you select.