They are in the service manuals, you may have to try a different year manual. Wheelbase varies, not the K form 67/ later MyMopar is the download site
EDIT Here ya go the 69 Dart/ Cornet manual, page 23-111
Click the black icon in the box and "save as"
EEEEEEEEEEEEEEAAAAAaaaaaaaaaaaaaaccccccckkkkkkkk!!! I see they don't show the K member mounts
