I own a 1986 Subaru brat and recently bought a 1987 turbo wagon for parts and motor swap. I can't find the pcm in the wagon or my brat. Can someone please help me?

By PCM, I assume you mean Powertrain Control module. If so, they don't exist in these early models. The Legacy was the 1st model which controlled bot the engine & gearbox.

The 87 has an ECU for the engine (which is mounted under the steering column on MPFI and turbo, and if it's got a flapper style MAF sensor, there is an ignition timing box mounted behind the dash between the glovebox & door (please correct me if I'm wrong, but that's where it is for RHD models).

and if it's got a 4 spd auto, then the separate controller for that is in the left rear 3/4 panel. Other transmissions (including the 3spd auto) have no electronic control.

 

Isn't a Brat carburettored? if so, why would it have any computer at all...

Okay thanks a lot. I was pulling the motor and my buddy said don't forget to pull the pcm and I couldn't find it. I guess that's why haha thank you for the help!!