low buck project. BB dart...headers?

Does anyone have any experience with the hedman b-body headers in an a-body with a 440?

I've heard many people using them on their 383 with different results. I've heard things from people saying they just had to ding them up a bit to make them fit all the way to people having to completely cut them up and re-weld them to make them fit.

But like I said, most of these people were using them on a 383, would a 440 be even harder to make them fit?