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zebra · 01-31-2011, 03:45 PM

yep... look in the console for the RPO codes. for an 87 IROC, you should have both Z28 & B4Z

also, in 87, they had both Z28 & IROC badges because the IROC package was an option to add to the Z. and they didn't drop the factory carbs til 88, so you could actually have a factory motor.

check the 8th digit in your VIN. if it's H, it came with the LG4 carb'd 305

01-31-2011, 03:45 PM	#6
zebra just can't seem to leave Drives: your mom wild!! Join Date: Oct 2008 Location: cold & windy Posts: 10,625 View My Garage	yep... look in the console for the RPO codes. for an 87 IROC, you should have both Z28 & B4Z also, in 87, they had both Z28 & IROC badges because the IROC package was an option to add to the Z. and they didn't drop the factory carbs til 88, so you could actually have a factory motor. check the 8th digit in your VIN. if it's H, it came with the LG4 carb'd 305 __________________ Eve ('00 FRC): hot-air intake Rowan ('09 H3): 5spd mom-mobile Penny ('99 Sierra): 5.3 / HD 5spd... gone but not forgotten Samson ('18 HD): compounded 408