Center link hitting oil pan preventing full right turn

The 67 had one bracket that hold the idler arm while the 68+ has two (much better design).

This is true, but even if you have a '67 K-frame the pan was the same old 893 used from '67-'69 on BB-A-bodies and the '69 440's.

Are you sure you have a BB pitman arm??? They are different than SB.