1960s Heater Matrix Core Replacement on a 1967 DeVille

[mbracing]

Hallo everybody, I'm in need to replace my leaking Heater Matrix core on my '67 DeVille Sedan Hard Top, it is a DIY job considering my - I must admit - limited mechanic experience or it is better to search for a capable professional? Where I can see some detailed instructions on how to do it, apart from the limited ones described on the Workshop Manual?
Many thanks in advance for your help!
mbracing

[Julien Abrahams]

I do not think it is a too difficult job to tackle yourself. Here is  a copy of the shop manual. It basically describes it step by step.