I got mine for 29.95 clearance at PAW in 1983. It consisted of an hobbs vacuum switch , (0" vacuum closed ),a hobbs pressure switch some plastic hose, a plastic fittng to hold a brass jet, and a windshield washer tank and motor. The way it worked was that the power from the ignition went to the pressure switch which was plumbed into the engine oil pressure system then power went to the vacuum switch then it turned on the washer pump. In this way when the engine was running and engine vacuum dropped to zero (full throttle, or accelerating) water was pumped into the air cleaner. Through the fog of 25 years I believe the smallest jet ,which I used was .010 I still had a problem with too much water being injected at times. I was in New Mexico at the time and most of my driving at something over a mile high and average pump octane available was 86-88, to get power out of my engine I needed to run a ton of spark advance, hence the need for octane boost. The 2 liter pinto motor is not far removed from the 2.3 motor