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.
Grass seed is easy to sow and grow, but Texas gardeners must choose the right grass for their hot summers in order to maintain a thick green lawn. Many types of grass grow well in Texas, though some are better suited to northern Texas and others to the hotter southern region. In Texas, plant grass seed in the spring or the fall.