OEM 3B Radiator....how long ?

[cruiser_guy]

Yes my and most every other 3b, I think, has the inlet and outlet on the drivers side(or Port side for the sailors..if that is the left side pending how you are looking at your toy!)

If yours is different then somewhere along the way your truck got an '81 rad in it. Find a new thermostat housing top cover and you'll be good to go. I can't remember which side mine is but I know '81 was different from all others.