To the Haynes manual!
My 86 has a vac diagram just above the rad
go to eBay and look for service manual
my chevy blazer 1984 the air conditioner blows from down side only.
childers foundation
There is a Vacuum diagram on the plastic shield above the rad fan, although if you are not so lucky as me, it will be all torn or un-readable. I am still on the search for one online...
www.pelicanparts.com has it. I found the routings on http://www.clarks-garage.com/
look on e bay, they had a use Nissan service manual for 5.00
You can find some vacuum diagrams in the Haynes repair manual. This can be found at any parts store.
Chevy didn't offer the 5.7 on the Camaro in 1984
buy a haynes book
look on eBay for aservice manual