where are you guys mounting your PCM? PSI Conversion harness with PCM

[paradigm]

Not sure if all G bodies have this hole. This is a 2" hole where the ECU wires used to pass through on an 87 Grand National. On passenger side behind glove box.

With a Haltech 2" grommet I was able to fit all the wiring for a Holley Terminator X max plugs 4 power wires and 2 fuel pump wires.

At first I was convinced they all would not fit. Some connectors are huge. I passed the big stuff through first and stayed persistent and it all went through.

The 2" hole for the factory ECU behind the passenger front fender is in my 86 MCSS and seems to be on all G-Body cars. However because the PSI conversion harness has the fuse block / relay center near where the PCM is, and because the engine is already wired up with the harness I would have to try and pass the PCM connectors and fuseblock / relay center through this 2" hole from inside the engine bay through the firewall into the cabin. Plus space does look limited under the passenger side dash area for the big PCM and all the wiring, so I am going to leave it all in the driver front area of the engine bay and try to neaten up / hide the wires as best as I can. Not ideal, but I will have to make it work this way as this is how the harness was setup by the previous owner.