obd2 started in 95 for legos.
using the engine long block is going to be pretty simple, use the existing intake manifold on the 94 long block and swap away.
the challenge is going to be controlling the turbo and i have zero experience with that. worst case you swap in the 94 ECU and the wiring harness. it will delete the obd2 and convert it to obd1, but since it is a 95 that is not an issue. if you do this you will not need to use the 95 intake.
you can probably use the croos member as well from the 94 on the 95 car. i doubt they change it much but again, i don't know.