Quote:

does anyone make W8 2" headers or bigger that will work with a stock K-frame



Yeah.
Here are your choices.
Get ready to shell out a couple thousand to have a quality set made......I doubt 2 " will work , but I'm certainly not the last word on this.
Or get an A body set either semi welded and add your own flanges or completed and cut their flanges off.
SPD has the flanges and there are a couple different W-8 versions that I am aware of so make sure you get the right ones to start with.
http://spdexhaust.com/
For my deal , I went through SPD for the flanges and got a set of un-welded later A body 1 7/8" headers from Stahl.
Then married the two up for my '65.
Stahl does not make headers anymore , but they may still have some inventory laying around , so I would call them and see.
It took some of the guess work out of it for me.
But I have an AlterKtion in there and it was still a fair bit of work.
Shelf stuff is very rare for these deals.