I purchased this flywheel from Summit Racing in March and was giving the wrong part number. After we installed it and cranked the motor over, we realized that something was off. We have a ford racing 351W motor that is externally balanced. This is on me not double checking the number before installing. 
So, with that said I have this new/used flywheel for sale that does show some marks from where the clutch engaged.  Please look at the pictures closely and let me if you need more pictures or have and questions.