I'm replacing the heater core in my non-A/C '69 smallblock car. I have removed the heater box from within the engine compartment and the heater core is out. What is the recommended material to use for resealing the heater box to firewall area? It was sealed with some goopy black material that seems to be some kind of non-hardening sealer. Is there a commonly available product that would serve in this same function?
Thanks,
Shannon
Thanks,
Shannon
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