Very interested in this as well -- the wiki seems to be missing a number of mods needed to make everything work on a NA8. I have a '94 (usdm model), 48 pin connector.
Here are the things I've noted are different between 94-95 and 90-93:
Main fan output: As mentioned it is 1R on a 1.6 and is 1K on the 1.8 so needs to be jumpered.
I'm using 1R as a flex fuel input -- on the 94 this is for the purge valve solenoid. So need to figure out where that should go.
5V reference: 1.6 uses 1N, 1.8 uses 2K.
Boost control: 1.6 uses 2K, 1.8 (me at least) uses 2O (goes to maf plug)
TPS: 1.6 uses 2L, 1.8 uses 2M
Fuel Pump Output: Mentioned in wiki, 1.6 uses 2O, 1.8 uses 2T, map the pin in TunerStudio to A9
Injectors: Seems ok -- wired for sequential, 1.6 only uses 2U and 2V but the PNP is using 2U, 2V, 2Y, 2Z
What I'm not sure about is what needs to be jumpered on the board, what (like the fuel pump) can be remapped in TunerStudio, and what if any actual traces on the board need to be cut. For example if 2K on my harness supplies a 5v reference and that is jumpered to 1N then it seems like the trace for 2K on the board needs to be cut and jumpered to 2O so my boost control will work. But maybe that can be done in software.
Any guidance would be appreciated!