how can you tell a iroc z28 from just plain z28 86 camaro

Hi Josh! The answer to that question is going to change from model year to model year. Check the Camaro section of CarGurus.com for details on the different trim packages. Good luck!

Well the one Obvious way is that the Iroc Z usually tends to have Stripes on the lower body along with big silver or red letters on the lower part of the door saying IROCZ, another way is by looking at the passenger side of the dashboard where the Dash Badge will say either Z28, or IROC on top and Z28 below in tiny letters in Red.

there are RPO codes under the center consule lid... i belive B47 was the iroc package code