John, you mention you have a GLT 1982 with pulsair exaust system.

Here in Canada 1982 GLT model was equiped with CIS injection on a B23 engine I beleive.

On the other hand I am very familiar with pulsair because my DL 1982 carburated engine has it. I just replaced lately that air injection manifold with one in good condition I had picked up at a junk yard, 20 years ago may be. It was part of a head gasket job to begin with.

The engine head has small holes under the exaust manifold ports where the pulsair 3/8 inch tube are connected. They have flanges that are squeezed against the head and held there with a small fork and 10mm screw. Seal is done with a gasket washer.

It is narrow space there and I beleive you will have to remove the exaust manifold. Be carefull not to break studs or pulsair screws.

Your best option is to plug (weld ?) the pulsair flanges near the head as long as the car meet environment rules in your region.

Hope that helps.

Roland