Anybody have fitment issues with Sanderson headers?

[Rob68c10]

I ordered a set of their coated headers a couple of weeks ago. I paid for three day shipping and got them a week later....but that's another story.

I go to pop them on last Friday and the passenger side collector hit the frame so bad I couldn't get the bolts started. The driver side bolted up but the collector was pressing against my transmission kickdown linkage. I contacted them and spoke with a guy and he said they have installed them on many trucks with no issue. I tried to explain where it was hitting the kickdown linkage and he couldn't understand the kickdown was a metal rod and not a cable.

My truck is a 68 with 307 and a powerglide. Am I missing something?