I used a set of Hookers that were supposed to fit but hit the steering box. I believe it is due to the heads having a slightly different angle than the 283 heads had (I am using a 350 now). Anyway, Hooker sent me some extra tubes at no charge and I moved the outside header tubes forward to miss the box.
It wasn't a hard mod and has worked well. As far as leaks, I respectfully disagree. Install and retighten a time or two after they've been run and they stay pretty well.
