One brass plug is temporary (between the runners) and will be replaced with a home-fabricated temperature probe when it arrives. Mine is made for a different application, so I have to provide the semi-rigid probe for the thermocouple myself. There will be a small tube attached to the other end of that drilled plug.
The other two modified plugs are to allow for final fitting soldering (through those holes in the LIM), then will be sealed and plugged before use. They only have to withstand 15psi.
Final soldering and leak checks will be tomorrow afternoon after work.
For those that missed it, there are a bunch of nearly-finished pics on the previous page.
Look carefully at this re-posted pic from the previous page to see the fittings exiting the LIM under the nosedrive for the intercooler:
Also, if you look at the LIM pics on the previous page, you'll notice just how very wide that core is in comparison to S2 intercoolers. It'* quite significant. This was probably the key to my success in the original test.
Tomorrow night, we solder the connections, pressure test the system, and continue with the top end build. Some cutting and welding will be necessary on the front end for the intercooler radiator.