The test port is on the left rear of the intake.
4.3 Vin W (8TH DIGIT OF VIN) - 55- 61 PSI
4.3 Vin Z Torbo - 38 - 43
Here is a pic of were the Regulator is....
You will have to remove the Plenum to get to it.
Sunday, July 6th, 2008 AT 6:04 PM