1994-1997 Dodge Ram Heater Core replacement pt1

Heater core replacement and dash removal on 1994-1997 Dodge Ram pickups that don't have the passenger airbag (old square dashboard models). 1998 (late 1997) and later model pickup dashboards remove in the same way, but with one exception; they have the passenger airbag and is more bulkier to work with. So, if your heater core goes out, which truck will you be safe working on?