Yee haw!
I guess so, the dashboard being moved inward to accommodate that V8. Some, I believe, put small V-8’s in there and they fit OK. Vega allowed lots of room under there. It was the perfect car to tinker around and rebuild.
I had a buddy who stuffed a 350 big-block into one. I spent the afternoon swinging a sledge hammer into the firewall to make it fit. I can’t imagine cramming a 454 into one of those.