Help with pre ignition ping

I totally agree with you guys that the ping needs to be eliminate immediatly, and I agree it will defineatly destroy the motor we just wanted to try everything we could without a tear down first.The only info I got yesterday was what I posted but I do have an update... He set the timing to 35 degrees at 2800 with the mix of av gas and 93 and there is no ping and runs strong. So if you guys agree that those are ok timing specs for a 372 then it'll be an expensive summer to go cruisin then we'll pull the motor in the fall and change a few things around.Thanks again for your input guys I always get great info here.