It appears that you have T&D shafts designed for iron heads. Call Tom at Champion and ask him to send you a schematic for shaft mounted T&D's for 8 bolt aluminum heads. Know what you need before calling T&D. They are very little help when it comes to V-6 junk or anything else for that matter..
Check your intake side rocker studs for oil running down the threads. If they check out, take a close look at your guides? Are the heads new or used? If used, any repairs?