g,day,heres a question for ya,my 454 is running at 120F-135F at 4500 , showing 54 degrees total timing,seems to work good there doesnt appear to be pinging,Ive hung right over top of it and cant hear any problems, starts ok.I know ive got to bring up that temp,what i,m wondering is ,is it self destructing without me knowing it,what timing should i be at,what do you guys set your timing at.its factory gm hei,with a light sring kit.thks.....