While we are throwing opinions around, I'll add this one to the mix.
The 70mm MA is not an upgrade from the 55mm. No additional HP resulted from that.
The exhaust system on the 93 and newer cars was horribly restrictive resulting in possibly less hp.
The injectors did not create any hp at all.
94-95 cam specs were milder than previous years which actually limits HP above 4500rpm.
The 94-95 also had slightly higher compression and a crankshaft windage tray.
The main performance enhancing change that occurred in 94 is the better supercharger. Because of a better seal on the rotors, the blower was able to be turned significantly slower than the previous blower which results in more hp being available to move the car.
A combination of a 1995 engine with an 89 cam, a 94 blower spun with an 89 pulley and attached to an 89 exhaust system would result in the most possible HP, probably about 250hp and 350tq at the motor (220/310 at the wheels with a 5spd).