WWWW I think you talking about the FI exam . I have only sat the GE (Piston engine installation) exam and found it very hard to find notes on. Some of the subjects I need to know more on was Shaft alignment , repair of Kevlar/fabric intake shrouds and radial engine installations . The exams are old are hard to find books on .
I take it you have sat these exams ,where did you get your notes ?