Welcome to FCBO from the desert! Glad to have you here. You've heard the old saying "Chrome won't get you home!" right? Just teasing, nice looking engine!
I was wondering about that. Why a 160? I do notice that with the 160 thermostat, when the engine was cold, it sounds great. Once it heated up and in gear under load i hear a rattle. Not a mechanic so I'm not sure if its lifters or valves.