Where on a 350 motor for a 1984 GMC Sierra Pickup does the vacuum lines hook up to a 4-barrell quadrajet carburetor?

Answer

first get rid of that quadrojunk carb and spend a few more dollars on something worth installing and then reask this question

Answers such as above are not helpful. Quadrajet carbs work Excellently delivering fuel economy and performance. This person wanted help with the vacuum lines, not a flippant reply that showed your bias and lack of knowledge. If the original poster still needs help, he or she should find a good manual or pay Alldata for a schematic.