Any Toyota Techs on here?

I had a lebaron turbo that a couple vacuum lines were connected wrong, the egr vacuum and heater control vacuum were backwards.

So at idle with engine hot,heater hoses same temperature or one noticeably hotter?
Some heater hoses are reversible,perhaps core is airlocked.
There are 12 volt pumps that fit heater hoses. But if pump is bad it would only be a temporary fix.

Used to be i could open rad cap with engine running and stat open, could see coolant flow.