I have a set of cheap summit headers that I ran in my 65 Satellite with power steering that worked just fine. When I installed the 440, I put a 1970 B-body K member in the car. I am told that this moves the engine back two inches. The headers still fit with no issues. I have no problem running cheap headers if that is all you can afford or don’t want to pay the big bucks for a name brand, I say go for it. The gains of a long tube header is worth it over the stock manifolds. IMHO.
Merry Christmas to one and all,
Digger73