Bobmount-
I went over to the Fedco site (heater cores) and looked up the Geo tracker heater core, ah, it is $96.00!
That is not for the inexpensive cooling rig. Even a Chevette heater core is pricey. If you want a huge heater core the Caprice in around 1975 is about $26.00 or so. But it is 11" tall!
Also the late model heater cores are aluminum, and you may be mixing copper (block) with aluminum. I know water wetter is suppose to neutralize this but I did not go there.
Jim
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