I'm a Camaro person, but can probably help you out anyway.
performance diff = RPO codes were weird for '93, but should be G92 most likely. normal
155mph normal with RPO QLC tires
334 hp and 367 fptq isn't normal at all. Sounds like they maybe gave you the rating for a Firehawk?
Not sure about the oil system.
What's your VIN #? I can look into it and see if it has weird options.