mtridge wroteIf it a complete pass to K79 do we take ignore the OPI and take IFP or vica verca?
No, you don't ignore it. But you do call the correct foul.
If K79 has done nothing other than catch the ball, it's Illegal Touching, not OPI.
Same penalty yardage, although the basic spot for the IT would be the previous spot. You still can't enforce the LOD provision.