I have a 1985 Cadillac Eldorado with the 4.1 liter HT4100. In Washington State and Emissions are not an issue. I will eventually remove entire unit but I had to take the belt off and nurse her home last night and I want to just put a smaller belt for water pump only. What size would it be and is that Kosher to leave a.i.r pump on but not utilize it until I can get to actually removing entire system? Thanks.