Can someone tell me what the benefits are (if any) To "locking out" the mechanical advance in a MSD Pro billet distributor? When would you want to do this? I'm running A BBC with a 6-71 and according to MSD my old distributor wouldn't come into full advance until 4500rpm. My 660 times were always slow but picked up on the top-end. If I locked out the timing I'm thinking this would help with the that? Am I crazy? It makes sense to me just not sure if doing so will damage anything. Or would it be better to set up the distributor with the lightest springs and biggest bushings to get full advance at about 2500rpm?