noise coming from timing chain cover

What I'm working on is a 360.rebuilt about 3yrs ago.Timing chain is new,double roller,Comp I think.I thought the noise was a lifter.The only thing I can think of that I reused was the thrust plate.The fuel pump is a Carter muscle car.I've got some medical problems so I have to fix the noise w/minimal cost because I might end up selling the car.Its much quieter now that I squeezed the lever in a little.I might try another pump before I pull the timing chain cover.I wonder if it's catching because it has a double roller chain now,wider that single? I did notice that the chain I was a little sloppy when I installed it.But the timing is not jumping when I checked the timing w/a timing light. When I looked at an Edelbrock pump online I notice it had indentation right where I had to bend mine.