Howdy folks I recently purchased this 720 and I’ve been chasing problems from the very start. I think I’ve narrowed it down to one final mistake from the previous owner. When I got the truck, my distributor would have to be fully advanced to get the timing at 0* tdc. I knew this was screwy so I went to the oil pump spindle to figure out why it was off. Sure enough, when at tdc on compression stroke it was almost 180* off from where it should be. I reindexed it to the proper position and was able to get my timing in a normal 5* btdc with the distributor pretty much in the middle of the adjusting bracket. After doing that the engine ran much much better but I’ve noticed a lack of acceleration on take off and a definite cam rattle. This was confirmed when I pulled the valve cover off and saw score marks towards the front of the cam between the lobes, petering out towards the firewall. I set the engine to tdc again and examined the cam sprocket in relation to the shiny link on the timing chain that the previous owner replaced. It is 2-3 teeth off where my manual says the “bright” link should align with the #2 punch hole. Is there any easy fix that wouldn’t require taking the front cover off and just reindexing the cam itself? Thank you for any response I’m losing my mind over this thing.