It seems that the throttle is engaging properly - the engine revs up to 5000 RPM but definitely revs up slower compared to the silver 87. The boost signal is indeed reaching the ALDA (I ran a line direct from the manifold to it) but with no increase in power when the boost (10 psi) comes on. The ALDA has not been tweaked on either car, but it looks like that will have to change soon. Here's some tests I did today:

Test drive #1: Boost lines connected normally (through overboost sensor, etc) still slow - 0-60 in over 15 seconds
Test drive #2: Boost lines ran direct from manifold to ALDA - drove no different from test #1
Test drive #3: Boost line disconnected from the manifold (no boost reaching ALDA) yielded the SAME result as tests 1 and 2.