So I saw a video on YouTube the other day, and in the comments section the owner said that he fit the engine without any sheetmetal modification. If his car had originally came with a 390, I would have assumed that it was possible (since I think the shock towers were different in those cars,) but he said it came with a 289. Does that sound right to you guys? It was hard to tell from the video, but I think he was being honest (and it looked tight as hell.. no chance of plug replacement with the engine in the car .) What do you guys think? I know I've asked a similar question before, but I couldn't remember if you guys said it was possible to do this. TIA.