gentleman , this is a factory new C model engine that has been on and aircraft , all accessorys are included, all ADs thru 1987 have been complied with , and I am pretty sure that their are no other ADs after that time that would apply to engine or prop . the mag ADs have been done as well as the prop AD. this is a COMPLETE ENGINE AND PROP. the engine and prop were just run and everything checked out fine. if anyone would like to contact me , please call for more details. 734-377-6283. thanks Mike.