160 deg stats were for Alcohol antifreezes...which boiled-off at temps above 160F...
(This is why Ethylene Glycol antifreezes were known as "permanent" anit-freeze...)
Use the 180 or 185 F stat . The engine will be happier.
Good luck !
Frank McMullen
Frank McMullen 1941 Chevy dump truck 1949 GMC 100 pick-up 1954 Chevy 3600 pick-up 1955.1 4400 dump truck 1941 De Soto & other MoPars 1928 Model A F**D Special Coupe