Headers vs. Manifolds

I’ve read numerous post while searching this site that said B-Body headers would work in a big block A-Body with clearancing.
Yeah, you can find someone on here saying most anything. Back in the days when I was making engine dollies I had a guy on the forum tell me that he didn't need to buy an engine dolly since he just went to the grocery store and stole a shopping cart when he needed a dolly. So that is the level of advice you sometimes get on the internet.