Help to ID 86 Astro cabover super motor

Been searching for days, trying to find a wiper motor for passenger side of 86 GMC Astro cabover. Found mine was missing but the transmission linkage arm is still there, connected to the outside arm stud. (Stud moves when I move the inside link arm—but only a few inches of it I can see...looks like it could possibly directly mount to a wiper motor) The driver side unit is still there but behind steering column and clutch pedal bracket assembly, so difficult to get close look. I can see decal on it that says “Air Push”.
Can anyone tell me what the mounting bracket and motor for the passenger side looks like? And if it has any additional linkage that connects to the inside link arm? I’ve have a service manual but no part numbers and it’s not clear enough...