Im about to restore my 82 Trans Am and need most of the interior parts but ran across a good deal on a 88 Iroc with a pretty decent interior. What I was wondering is will the interiors of the two swap easily or are there differences in them. Thanks and I know it's a pretty bad question but just needed to know for sure.

I think it's all the same.

MOST 82-92 Camaros and Firebirds have the same or nearly identical interiors.

Does that go for the suspension and steering parts too?

Depends on what interior parts you're talking about....a few small rear trim panels might be the same, but the steering wheel, dashboard, door panels, seats, and center console are all completely different. They'll bolt in, but they'll be dead wrong for the 82 T/A.