[Arran]

That looks familiar, Philco sure didn't believe in wasting sheet metal in the 1940s, just about all of their AC/DC sets are packed like a sardine can The 46-1201s are worse but at least those did not use wire with perishable insulation. On my 42-327 I had to replace the wiring in both IF cans, along with any other rubber covered wire. For some odd reason Canadian Philco sets used cloth covered wire from 1939-42, except for in assemblies like IF cans, but Rogers built sets used rubber/gutta percha covered wire going back to the early 1930s. You just have to deal with it one step at a time, one component and one terminal at a time. One thing that helps is the under chassis diagrams that Philco had in their manuals showing parts placement.
Regards
Arran