[hugger6933]

Depending upon your application, there will be a pipe plug either in the back of the carb in the center at the base, just above the throttle plates. Also if you look on the manifold behind that spot I just told you to look, a couple inches back from the carb there should be a pipe plug there as well.Both of those have what is known as a manifold vacuum source. either one of those places will be fine to run the booster for your truck. The factory put the hose in the back of the carb on all of the applications I am aware of. Jim