No. There were major engine changes between those years.
intake manifold is DIFFERENT for models 1985 and 1988
yes
your vehicle is equipped with a water cooled manifold
look on top of the intake manifold towards front of vehicle
YES
The oil pressure sensor on a 1988 Chevy 1500 5.7 is located on the engine. It is on the right side, near the intake manifold.
a bad head gasket or intake manifold gasket.
yes if they are both throttle body engines
The oil sending unit is below the intake manifold, it is threaded into the block.
yes it will all Chevy small blocks after 1986 through 1995 use the same angle and bolt pattern for the intake........if its aluminum make sure you get a high seal gasket....
The ignition module on a 1988 Chevy Celebrity with 2.5 engine is on the side of the block beneath the intake manifold. You can simply follow the spark plug wires to it. As information the crankshaft position sensor is behind the ignition module.
on the roght side below the manifold