I am in the process of installing this digital 7 with boost control and have a question as to where I should hook up the Map sensor so that it reads the intake pressure correctly. I have a fitting on the blower discharge tube or there is a couple of fittings on the carb. (Berry Grant). The fittings on the carb are either ported or constant vaccm???I also could use the larger fitting on the back of the intake I guess.....Obviously I am confussed.