My radiator guy has an early dated 11/66 W MO 20-inch radiator which would be correct for a Nov.66, Dec.66, Jan.67, and maybe Feb.67 assembled 1967 GT 350. It needs to be recored and could be configured for either an automatic or 4 speed, which is his specialty. PM me if you have interest and I will put you in touch with him.
Dave
PM sent!