a/c vacuum lines help
 

i have a 1983 k5 and im going to swap in a sb 406 chevy. I do want my a/c to work. dose anyone know what vacuum lines control the a/c that are on the engine mana fold. its a stock 305 whit all the stock lines still in place. looking at it makes my head hurt its like a rat nest of vacuum lines. i dont have emissions so im also getting rid of the egr and smog pump. i just need help with the a/c vacuum lines.

Thanks