Thanks for the info...I run an old 1998 purchased set of Stage 6's on the dragster that have been extensively worked, repaired twice and are waiting for another repair, none of which was the heads fault this set came along and the price seems too good to pass up (500 for the pair)...If I buy them they will be immediately sent off to one of our resident Moparts head experts for a complete checkout, port job and build up. Just didn't want to buy a set that was a known suspicious lot.