Edit: whoops, should have looked at the part. I thought you meant the inner fenders where the hood hinges go. I want to say that part you listed is the same, but have never seen them listed for both cars. They 'should' be the same (see below) but I think there are small differences. I would think they could be made to work, but I've never compared them side-by-side.
The lower firewall is the same too. The upper cowl panel (base of windshield) is very close, but differs from the e-bodies at the pass side, near the hinge corner.
For the most part, e-body and b-bodies are the exact same from the radiator support back to the rear of the front floor pans, and up to the base of the windshields.