anybody have or know where i could get a vacuum hose diagram for a 2.8 mfi?

 

Go to ANY GM DEALER parts counter.
Buy the guy a soda.
You want the PVC hose set up diagram.
Ask him for that printout and also get the print out with the parts numbers.
BUT, all will be wasted, as majority of those hard line plastic parts no longer exist in GM.
Use windshild wiper hose 5 /16" to patch lines.
1/2" heater hose, base of distributor vacuum connection.