Geeze man, if I were you I would fix that temp gauge before I drove the truck again. I've had to much bad luck with engines overheating..
As for the 3 core radiator, it's a direct bolt in for all 2nd gen trucks and 1st gen 4Runners because it's the same cab and also the same radiator as a Turbo, minus the Turbo water cooler lines. As for 1st gen trucks, you will need to slightly grind each side of the lower tank ribs in order to clear the frame. I've got a 3 core Turbo radiator in my '81
BigMike
