I installed a JPI 790 with fuel flow a year ago. Here is how I mounted my flow transducer. I did have to use a 90 degree fitting after the transducer. With the fittings on, I kind of planned the location of the transducer and measured the distance for the flexible fuel lines. Had "Aircraft Hose Store" make the new shorter lines. Made sure things were mounted with clearance from the cowling.
