Vacuum Canister NAPA part #730-1607 ~$12.00
Vacuum Check Valve, Pep Boys, "Help" parts section ~$5.00
EVAP Purge Control Valve hose adapter.
Switched Relay (Radio Shack 30AMP Relay) ~$5.00
Vacuum Hoses ~$10-15

MAP/Baro Switch (Vacuum Solenoid) from a Nissan (Pulsar, 3rd Gen. Maxima)
or
Dawes Dual Stage Control Solenoids $38.50
http://www.dawesdevices.com/solenoid.html

Harlan RPM Switch $50
http://harlan.sketchy.net/store/rpm/rpm.html

 

DO NOT get the harlan RPM switch, get the Summit Racing RPM switch www.summitracing.com

and read this
http://forums.maxima.org/showthread.php?t=217001