Further to earlier questions about Dwell variations. With intial timing set at 8* & with vacuum connected, my timing light appears to indicate that at around 2200-2500 there is about 38-39 degrees total advance. ( I had to put additional estimated marks on the damper with soapstone, for past 30 degrees) Is this likely too much total with "C" heads on a 312 auto, using 87 octane fuel? Unfortunately, I'm somewhat hard of hearing, so if it's pinging, I'm not hearing it? Thanks.

Paul