Pretty sure my suction tube runs vertically up outside the 2 oil cooler tubes, but my photos are at home. This is on both my 1984 w/ R4 compressor, and my 1985 w/ Sanden on Rollguy's bracket. I bolted the factory tube manifold to my Sanden, using a certain rear head w/ "GM Pad" ports. Search for posts, if interested, which should answer your question too.

I later changed both the suction and pressure hoses w/ new barrier hose. I have a Master-Cool ferrule crimper (shown on a recent Wheeler Dealers episode for a 60's Volvo) which makes it look factory, but you could use Oeticker stepless ear clamps or Breeze smooth screw clamps.

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1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans