It also had the unstamped 3 core end tank (IA on 70 and 71) as well as the original top and bottom rails and even had the correct AC radiator cap still on it. this particular case it was a 4 speed version with the tank being CV with the date of L of 71. Imagine my surprise when I showed up to find yet ANOTHER 3 core radiator. He assured me, that it was infact an HD cooling radiator as he personally made extra certain that option was on the car when he ordered it in 1972! ( he was a bit agitated when I asked this, so I am guessing I wasn't the first to ask). I contacted the seller to ask if it was 3 core or 4 core as the pics were not so good. it was advertised as an HD cooling radiator for 70-81 firebird. I recently purchased a radiator on Craigslist.
The car was a VEEEERY low mileage nothing special car (read not a Formula or Trans Am) and had less then 25k miles, so no reason to doubt the radiator which is a 72 dated Harrison with AE tank (dated Nov, 71) correct Harrison top and bottom rails and correct unmarked driverside tank (would have been IA in earlier cars) is not the original radiator.
Now this would have mandated HD cooling to the best of my knowledge. the first was an Automatic car with 400 and A/C. So recently I have acquired a couple 72 radiators.
