Good Initial Timing and Too much Total Timing Problem. Seeking guidance to minimize total timing. 1969 Swinger 340 4 Gear

rebelcaptain said
57 is too much. That's why it's pinging. Set 35 with vac hose disconnected at 2600. Should make 50 when hose is hooked up

You need to read the entire thread. 57 is not too much with the vacuum can connected sitting still and not under load.