This is on the 86 T/A. I know where it is on my 92 but the 92 might be different. I did an engine swap on the T/A and now can't find it and I want to add a heater control valve. Where should I be looking?

 

It should still be coming out of the HVAC wiring harness under the hood. Just like on the 92. Someone might have broken it off.

 

i was looking at pics i took when i had the old engine in, I had no heater control valve, just heater lines going straight to the heater core.

 

sounds like someone did some chopping before you bought the car?? You should have a diverter valve on your heater hoses with a return line to your intake manifold. You should also have a vacuum line from the divertor valve going somewhere in your harness back behind the coil pack very close to the firewall.

 

got a pic? I had an extra vacuum line but it went to something that looked like a map sensor

 

Follow that skillfully drawn red arrow, lol. The vacuum tube comes out of that pack to the left of the heater hose connections at the firewall.