Look at the injector connectors Look at the CAS connector Are they the new or old style ? The CAS and injectors are different between 90 and 95. I would prefer the 95 harness in good condition at the very least. All the engine stuff is bolt on so no biggie there. Also look at the brackets for the intake piping and the radiator support. How they are made is a good indication of how much car was taken in the conversion.