My '86 has started smelling like coolant inside the cab when I run the heater and even the inside of my windshield kinda fogs up with I assume coolant. Anybody here ever had to remove your heater core from a Gen 1 truck?? How difficult of a job? I'm assuming the heater core is leaking and I'm hoping I can resolder/ repair but I may have to try to find a new heater core? Any suggestions / experiences welcome, thanks in advance. Bill