well you guys were right fixed it over my vacation it was indeed a torque converter bolt backed out 1/4" and hitting something....So I pulled it coated it in lock tight put it back in and did the same to the other two even thou they were tight and the "knock is gone! thanks a bunch for the help guys I would have never even thought to look there.... And on top of all this I brought the 400 home and stripped it down it is a awesome virgin block so 406 here I come....Since the wife already thinks I need a motor no need in telling her different lmao..