The 93 fuel linres are routed differently. Just use the 93 manifold, fuel rails and injectors. Each of those components is unique to the 93. 95 rails have a crossover pipe, requiring a groove in the intake. 93 rails do not have the crossover and manifold does not have the groove. 93 injectors batch fire, and there is a pulse damper on the rail assembly. 95 injectors are full sequential, no pulse damper. Can't mix and match.
93 injectors are 22 #/HR, 95 are 24 #/HR.
Have to keep the 93 throttle body. It has a connection on the quadrent for the 4L60 trans TV cable, 95 TB does not need a TV cable for the electronically shifted 4L60E. The 93 TB has a screw in IAC valve, 95 IAC is mounted with screws, and has a different electrical connector.
If you plan to keep the AIR system, the 93 pump is bolted to the subframe, F-Body 95 is bolted next to water pump. Not sure if the 95 Y-Body is on the engine. 93 passengers side exhaust manifold does not have an AIR connection. The passenger side AIR connection is combined with the EGR connection on the number 8 primary.
Y-Body water pump does not have the connections for the oil cooler coolant supply. F-Body pump has oil cooler connections, but they are plugged if the engine didn't come with an oil cooler. I think the oil cooler may only have come on the manual trans cars. Not positive. Y-Body pump also has a bulky mount for some other accessory on the passenger side. F-Body does not.
Need to check the knock sensor(s). F-Body has one 4,000 ohm sensor, mounted in the coolant drain port on the passenger side. I believe the Y-Body has one on each side. Can leave the extra on the driver side, but check the resistance of the one on the passenger side.
93 mounts the oil pressure sensor on driver side of block, just above the oil filter. 95 F-Body is mounted on top of the block, just behind the rear edge of the intake manifold. Not sure where it is on the Y-Body.
You have to keep the 95 Opti distributor. It's vented, less problems, and is driven differently than the 93. But since it is vented you have to pick up a vent/vacuum harness, unless it comes with the 95 engine. Then there is the short Opti harness that runs from the gray connector connector on the bracket on passenger side of intake manifold, to the Opti. You need to use the short harness from the vented 95. Has a different Opti connector.
Forgot..... 1 more. The 93 feeds RPM directly from the coil to the tach, with a filter module inline near the ICM. The 95 sends cam position sensor signals from the Opti to the PCM, then the PCM feeds the tach. You can use the 95 coil to feed the 93 tach. You just need to make sure you keep the filter in the circuit.