92 ni breaks or power steering

[chevybowtie]

I recently got a 92 intercooled 2wd 2500 it went threw a cab swap and it don't have power breaks or power steering I'm not sure if they worked before cause I'm not the one that did the swap I'm assuming it needs a pump but I'm gonna check the line first does anyone have a diagram of the lines and we're would the best place be to put a vacum gauge on see if it's making any thanks in advance

 

[oldestof11]

Does it create vacuum at the vac pump right under the injection pump? I'd pull off the big rubber line going to the brake booster and check there.