>>28563912
I know that feel. I just re-did the cooling in my snowplow ('86 Chevrolet K20) this summer because it was constantly overheating even in the dead of winter because the plow blocks the airflow. In summer with the plow off, it would still frequent 210 on level ground going 55 if it were above 80 degrees out.

Apparently, the "heavy duty" option was a tiny two-row rad that was used for the 292 I6, 262 V6, 305 V8, and 350 V8 universally.

Anyway, the question remains valid; is the radiator large enough?