I saw a 55 truck at a truck that had a 87 iroc IFS. I really did not get a close look as to how it was done, but it looked different so I ask the guy and he told me it was a 87. I've also read about it being done in classic truck mag. They said they will be doing a feature on the truck. I'm still waiting for that feature. It can me done, but should you do it is the when the are so many easier options is the question. I don't know the guys fab skills and reasoning behind this choice, but it was done and looked nice. But it may be more work than what its worth because as said before the third gen. camaro did not have subframes. I only know it can be done because I saw it.