Technical advice on this board never ceaases to amaze me! Of course the core comes out from under the dash. The problem is that there are 2 nuts on the heater box that are tucked in behind the fender. To remove them you have 2 choices: cut however big a hole in the skirt (that's not an option for me) or you can pull the fender.
The problem around here is that anyone who knows how to work on cars--rather than knowing how to talk about working on cars--is that the mouths have driven them away.
You are talking out your other mouth again Mervyn. Any good service tech knows that it's a three hour job to R&R a heater core in a first gen. Maybe 4 hours if you have AC. And there's no access hole cutting to do. No fender removal needed. For someone who professes that they know what they are talking about you better 'check yourself'. Maybe you were thinking about the blower motor?
Maybe you were thinking about the blower motor? 
