If you're keeping the EGR valve (why if you're removing the actuators?) add a boost signal port on the far end of the intake manifold. Using this picture as a reference -



- to the 4 o'clock of the circled 2 is the overboost switch (90-91 2.5 only). To the 5 o'clock is a plug. Find a fitting such as the boost signal fitting to/on the ALDA and thread it into the port revealed by removing the plug. Run a line from the new fitting to the boost actuator.

I'd be very careful drilling and tapping the turbo compressor outlet if there's any risk of shavings falling into the compressor wheel. Even if you're keeping the EGR valve (again, why?), see if you can add a fitting to the mixing pipe which can be removed and properly cleaned after drilling and tapping. I've yet to see the big green o-rings in the mixing pipe be in such poor condition that they couldn't be reused.

Sixto
MB-less