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Guy on the 'Book mentioned he's looking this again, he had last researched it here on tech:
"Many many moons ago pre Facebook, like LS1 Tech days this little factory radiator was real popular to use as a W2A heat exchanger. It was super cheap like $50-$60, only had a 3/4 hose in-out connections. No filler neck, no built in transmission cooler, and around 13 1/2” x 30” in size. I can not remember the application and spent hours trying to find it with no success. Anyone know?"
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Help ID'ing this heat exchanger 
