Sweet. I can't get away with duals on my 88' here in California due to smog laws. The smog tech can visually fail the truck. My 86' Suburban came with true duals and no cats from the factory and it's really easy to tuck everything above the frame rails for wheelin'. The 86' sub is my trail rig and the 88' pick up is my street queen.
Post up a pic of the exhaust work when done. Good luck with your build.