Header fail, stock manifold time!

2 things:
  1. I've installed lots of cheap headers, they've all fit. Steering arm goes through them so needs disconnected, and remove starter, raise motor like you said.
  2. If you go stock manifolds, go early 70's B-body. That will eliminate the "ugly" drivers side manifold

Me too! Some hang a little low, but as long as you don't ghetto your crap out in the weeds, they work well. I've probably installed over ten sets for me and others with no issues at all.