Didn't see the other 2 hoses going thru the firewall, so no heater?
The heater hoses are above the a/c hoses. The heater inlet & outlet are integral to the evap unit and protrude directly thru the firewall so their location is dictated by the location of the unit. A previous post shows those a little better.
1949 Chevy Panel Truck A Project Journal I'm old but I make up for it by being immature.
