dougs header d450

I read all the posts on the d450 dougs header for early abody.... don't remember anyone asking if the torsion bars have to be removed to intall the headers.. also if you have to cut the fenderwells to run any tubes thru.. these headers have so many slip connections wonder if you have to lift or raise one side of engine some to get them in there ? just wondering !
Some say these are a piece of cake to install and other not so...
my car is a 65 dart all stock 273 4sp. no PS .
What do you all think about the cerramic coating on the outside of the headers ? ... I was told they are not ceramic coated in the inside.
Thanks for any tech info !
john