My 87 GN has a vac brake system and I CAN"T GET ANY BOOST ON THE LINE. My friend went with a hydroboost system on his 86 GN (his was converted to vac too)and he is getting WICKED boost on the line. He bought a new kit for around $500 bucks. I just built a motor AND a trans so MONEY IS TIGHT! I just found a complete hydroboost system on a Malibu for $20 bucks! I went to Autozones website but can't find anything on hydroboost setups! I would like a Remanufactured unit instead of bolting the old rusty one on! Has anyone went this route? Anyone got one from Autozone or Oreilleys?