exhaust manifolds on a 5.3?

[oteixeira]

So I put the engine in my 70 C-20 project today. The engine is a 2005 5.3 from a Silverado. I was able to squeeze the drivers side manifold back on but it looks like the only way to run the passenger side is to notch the frame. Is that what you did, or is there a source for a good set of not $500 headers that fit this install?

Thanks,

Orlando